This patch prevents visibility of native widgets which for some reasons
has width or height of 0.
Due to async expose event in Qt5 we must force "hide_sys()" during
resizing for widgets with WA_OutsideWSRange flag. This avoid problems
for non-native and visible widgets which are converted to native and
then resized:
child->winId();
child->resize(0, 0);
Task-number: QTBUG-49445
Change-Id: Ied62a4f253f89447941b2dc03316db8c168f4bb5
Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>