fix(gui): editor theme loading and error/fallback handling improved #1478
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This PR should fix #1476.
After calling
MainWindow.setEditorTheme
onceMainWindow.editorTheme
always should contain a non-null value.First call of
setEditorTheme
is done byloadSettings
. Assuming an exception is thrown before so thatsetEditorTheme
is never called also means that initialization of MainWindow fails, so there should be no UI and state ofeditorTheme
field is no longer relevant.