8838 _Factors table fixes

[par456]

Resolves #8838

There were two things happening here.

One was that the _Factors table was not being cleared at the start of a run, so running a simulation multiple times meant the table would just keep growing each time. That is despite having comments saying it should be cleared, so I added it to the list with _Messages and _IntialConditions to be cleared at the start of a run.

Then for the repeated lines, it turns out the factors were written for each report instead of for each simulation. So if a simulation had 4 reports, it would write the factors in 4 times to the table. To fix this I moved the code from Report over to simulation, however that may not be the most appropriate place for it, so would like some feedback.