Starting from a checkpoint with different adaptivity parameters

[david-montiel-t]

There may be issues when restarting a simulation with different adaptive criteria than the original simulation.

For example, consider a simulation with minimum and maximum refinement levels set to 5 and 7, respectively. The simulation is run starting from time t=0 for Ns time steps and it outputs a the last checkpoint at time step Nc. If we restart the simulation from checkpoint corresponding to Nc but for the new simulation modify the minimum and maximum refinement levels to 4 and 6, respectively, the mesh in the region of the system corresponding to level 7 will not unadapt and stop evolving.