mac ISF editor: pop-up button/UI items don't work sometimes

[mrRay]

as far as i can tell, this is a bug with Qt specific to the mac platform (the windows version doesn't have this issue). this bug has been documented and reported to Qt- if this bothers you, please consider giving more visibility to this issue:

https://bugreports.qt.io/browse/QTBUG-71776?jql=text%20~%20qopenglwidget%20ORDER%20BY%20created%20DESC

...the only workaround i'm aware of now is to simply restart the application- this bug only occurs occasionally on launch!