In sensitivity runs, add the index of run to the charts. This makes it (somewhat...

In sensitivity runs, add the index of run to the charts. This makes it (somewhat) easier to see which parameter combinations yield which results, and it also solves the problem of auto zoom of the range axis of a chart (refs #4332).
In sensitivity analysis with many individual runs, do not update the datasets to charts in each iteration (total number of updates currently limited to 20).

git-svn-id: https://www.simantics.org/svn/simantics/sysdyn/trunk@27666 ac1ea38d-2e2b-0410-8846-a27921b304fc