fix: assert for GUI thread in getters instead of get(I)App
#5102
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getIApp
andgetApp
can only be called from the GUI thread, as they contain singletons that expose functionality only available in the GUI thread. I'm adding agetCApp
that returns a subset ofIApplication
which is safe to use outside the GUI thread. It should be obvious, thatconst &Paths
andconst &Args
are safe to use outside the GUI thread [as long as no one keeps a&Path
/&Args
and they have been initialized].Not sure how to call the new supertype. I was thinking of "C" for "concurrent".