XGServerWindow.m small fixes#25

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trunkmaster wants to merge 3 commits intognustep:masterfrom

trunkmaster:master

Commits on Mar 11, 2020

* Source/x11/XGServerWindow.m (_createAppIconPixmaps): accept
trunkmaster
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Commits on Mar 24, 2020

Merge branch 'master' into master
fredkiefer
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Commits on Sep 16, 2020

* Libraries/gnustep/tests/back-art/Source/x11/XGServerEvent.m
trunkmaster
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