When I open a python script that was saved in Python (pyimagej) mode, or switch between tabs in the editor, the language keeps switching back to Python (jython)

I don't have any ideas off the top of my head on how to fix this... except that if we are in python mode, then the pyimagej language should be the "preferred" implementation.

However this is fundamentally going to be annoying one way or another, in or out of Python mode or if the user ever wants to use whichever isn't higher priority.