constrained/simultaneous fit menu option GUI problem (both on Mac and PC)

[butler]

Loading a fit into SasView should activate the constrained fit menu item (which is greyed out when no fit is available). It does in 3.1 alpha (prior to code camp). in current trunk, it stays greyed out and inaccessible. It however can be activated by switching to another perspective (Pr or invariant) and back. Also it will activate after loading another fit panel and then pressing fit. Also, sending two data sets to fitting simultaneously seems to activate the menu item.

Once activated it will stay active and work as expected even if all other fit panels are killed.

There is a bigger question about whether constrained fit should be allowed currently as polydispersity does not work in that instance but the GUI problem needs fixing either to forbid a constrained fit (though that should be easily changed once we fix the polydispersity issue) or always active when only one fit panel is up (not randomly active as it is now)

[butler]

After Mathieu worked on code and found a focus issue, testing of Jenkins download on Yosemite and windows indicates problem is mostly fixed.

However,now, once constrained fit is activated, if one removes all panels but the last one and then removes the model the "details" button will tell you that you have no model selected but the constrained fit is still highlighted and thinks the old model is still there…. if you click around on the GUI eventually it will go away. changing perspectives and then back seem to reliably reset the constrained fit to not active.

This is unlikely to cause much problem to anyone so suggest we downgrade to minor and move to next release.

[butler]

This is irritating enough and speaks to stability issues so should probably be moved up from minor to major. Not thinking it rises to critical for this release unless someone else feels differently and thinks they know how to fix?