Bump QT versions

Currently PySide2 is used. One should test with different QT versions and possibly change setup.py to require one qt-binding, wither pyqt or pyside and any supported version.

Scheduler-gui should work with both PySide2 and PyQt5 AFAIK. The comments for one or the other in graphics_graph_event.py and possibly elsewhere should be seen as obsolete. If I remember right, there is a problem when using parent in the constructors, resulting in segmentation fault. And solving the segmentation fault on one qt-binding resulting in segmentation fault on the other. Removing parent from from all classes was on the todo-list but was never done. The parent parameter is unused and unnecessary as the parent will be set when addToGroup() is called.

Yes, you are correct. At the time, I was thinking that PySide2 was QT2, but it is indeed QT5.

Can be interesting to try QT6 though, so I'll leave it open.

added SFG GUI Scheduling GUI labels

removed SFG GUI label

added SFG GUI label and removed Scheduling GUI label

added Scheduling GUI label and removed SFG GUI label

added SFG GUI label

assigned to @simbj106

Made some changes and recompiled on my branch to make pyqt6 work for me. Do we need to maintain support for pyside2 and pyqt5?

mentioned in merge request !459 (merged)

closed with merge request !459 (merged)