Fix: Exp number incremen on master. Sage/CODAP
Fix: Exp number incremen on master. Sage/CODAP

Original work didn't account for new documents loading without having run a simulation at least once.

Story:
Experiment increment doesn't work in translated versions of SageModeler/CODAP

[#159214059]
https://www.pivotaltracker.com/story/show/159214059

concord-consortium/building-models,concord-consortium/building-models,concord-consortium/building-models,concord-consortium/building-models,concord-consortium/building-models