Fix crash when setting blur effect
Basically to use QWidget::windowHandle() to get a QWindow*, we need to first set the Qt::WA_NativeWindow attribute on the QWidget. See: See https://phabricator.kde.org/D23108
BUG: 439871 FIXED-IN: 21.12
Basically to use QWidget::windowHandle() to get a QWindow*, we need to first set the Qt::WA_NativeWindow attribute on the QWidget. See: See https://phabricator.kde.org/D23108
BUG: 439871 FIXED-IN: 21.12