simulator settings not loaded correctly

[lkeegan]

Describe the bug
When loading an sme file with v1.1.0, the simulation options are not correctly imported

To Reproduce
Open built-in brusselator model, save as sme file, open this file, look at simulation options

Expected behavior
Simulation options should be saved & re-imported on load.

Screenshots
before saving:

after saving & re-loading model:

log output shows the values are correctly stored as xml annotation in the saved model, so presumably something is going wrong with the conversion from xml to Settings;

I][xml_annotation.cpp:  63] getSbmlAnnotation :: annotation: '<settings>
  <cereal_class_version>0</cereal_class_version>                                                                                                                                                                   
  <simulationSettings>                                                                                                                                                                                             
    <cereal_class_version>1</cereal_class_version>                                                                                                                                                                 
    <times size="dynamic"/>                                                                                                                                                                                        
    <options>                                                                                                                                                                                                      
      <cereal_class_version>0</cereal_class_version>                                                                                                                                                               
      <dune>                                                                                                                                                                                                       
        <cereal_class_version>0</cereal_class_version>                                                                                                                                                             
        <discretization>0</discretization>                                                                                                                                                                         
        <integrator>alexander_2</integrator>                                                                                                                                                                       
        <dt>0.10000000000000001</dt>                                                                                                                                                                               
        <minDt>1e-10</minDt>                                                                                                                                                                                       
        <maxDt>10000</maxDt>                                                                                                                                                                                       
        <increase>1.5</increase>                                                                                                                                                                                   
        <decrease>0.5</decrease>                                                                                                                                                                                   
        <writeVTKfiles>false</writeVTKfiles>                                                                                                                                                                       
        <newtonRelErr>1e-08</newtonRelErr>                                                                                                                                                                         
        <newtonAbsErr>9.9999999999999998e-13</newtonAbsErr>                                                                                                                                                        
      </dune>                                                                                                                                                                                                      
      <pixel>                                                                                                                                                                                                      
        <cereal_class_version>0</cereal_class_version>                                                                                                                                                             
        <integrator>1</integrator>                                                                                                                                                                                 
        <maxErr>                                                                                                                                                                                                   
          <cereal_class_version>0</cereal_class_version>                                                                                                                                                           
          <abs>1.7976931348623157e+308</abs>                                                                                                                                                                       
          <rel>0.0050000000000000001</rel>                                                                                                                                                                         
        </maxErr>                                                                                                                                                                                                  
        <maxTimestep>1.7976931348623157e+308</maxTimestep>                                                                                                                                                         
        <enableMultiThreading>false</enableMultiThreading>                                                                                                                                                         
        <maxThreads>0</maxThreads>                                                                                                                                                                                 
        <doCSE>true</doCSE>                                                                                                                                                                                        
        <optLevel>3</optLevel>                                                                                                                                                                                     
      </pixel>                                                                                                                                                                                                     
    </options>                                                                                                                                                                                                     
    <simulatorType>0</simulatorType>                                                                                                                                                                               
  </simulationSettings>                                                                                                                                                                                            
  <displayOptions>                                                                                                                                                                                                 
    <cereal_class_version>0</cereal_class_version>                                                                                                                                                                 
    <showSpecies size="dynamic"/>                                                                                                                                                                                  
    <showMinMax>true</showMinMax>                                                                                                                                                                                  
    <normaliseOverAllTimepoints>true</normaliseOverAllTimepoints>                                                                                                                                                  
    <normaliseOverAllSpecies>true</normaliseOverAllSpecies>                                                                                                                                                        
    <showGeometryGrid>false</showGeometryGrid>                                                                                                                                                                     
    <showGeometryScale>false</showGeometryScale>                                                                                                                                                                   
  </displayOptions>                                                                                                                                                                                                
  <meshParameters>                                                                                                                                                                                                 
    <cereal_class_version>0</cereal_class_version>                                                                                                                                                                 
    <maxPoints size="dynamic">                                                                                                                                                                                     
      <value0>19</value0>                                                                                                                                                                                          
    </maxPoints>                                                                                                                                                                                                   
    <maxAreas size="dynamic">                                                                                                                                                                                      
      <value0>26</value0>                                                                                                                                                                                          
    </maxAreas>                                                                                                                                                                                                    
  </meshParameters>                                                                                                                                                                                                
  <speciesColours size="dynamic">                                                                                                                                                                                  
    <value0>                                                                                                                                                                                                       
      <key>A</key>                                                                                                                                                                                                 
      <value>4294959385</value>                                                                                                                                                                                    
    </value0>                                                                                                                                                                                                      
    <value1>                                                                                                                                                                                                       
      <key>B</key>                                                                                                                                                                                                 
      <value>4278223560</value>                                                                                                                                                                                    
    </value1>                                                                                                                                                                                                      
    <value2>                                                                                                                                                                                                       
      <key>D</key>                                                                                                                                                                                                 
      <value>4294279728</value>                                                                                                                                                                                    
    </value2>                                                                                                                                                                                                      
    <value3>                                                                                                                                                                                                       
      <key>E</key>                                                                                                                                                                                                 
      <value>4287700660</value>                                                                                                                                                                                    
    </value3>                                                                                                                                                                                                      
    <value4>                                                                                                                                                                                                       
      <key>X</key>                                                                                                                                                                                                 
      <value>4293269835</value>                                                                                                                                                                                    
    </value4>                                                                                                                                                                                                      
    <value5>                                                                                                                                                                                                       
      <key>Y</key>                                                                                                                                                                                                 
      <value>4282168395</value>                                                                                                                                                                                    
    </value5>                                                                                                                                                                                                      
  </speciesColours>                                                                                                                                                                                                
</settings>'                                          

[lkeegan]

This is a reincarnation of the bug we had with symengine where doubles were sometimes mysteriously incorrectly parsed, and is caused by Qt setting the locale, which if e.g. DE breaks strtod (see symengine/symengine#1566)

For now we can apply the same workaround as for symengine: temporarily set the locale to the C one while importing settings from xml