The handling of StyleChange de-maximizes the child window temporarily,
which was emitting subWindowActivated.
This would crash lokalize, because deactivating a window means deleting
the widgets associated with it, and style-change handling is done in
QApplication by looping over QApplication::allWidgets, which would then
contain dangling pointers.
Full valgrind log at https://bugs.kde.org/show_bug.cgi?id=271494#c7
Change-Id: Ifb24032cde2cd470dcae7cd553ec5ab45a919dd6
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
a6e5ccbe22