QWidgetPrivate::isFocusChainConsistent() iterates over
QApplication::allWidgets() to identify and log inconsistencies.
In applications with many widgets, this has a major performance
impact.
Disable the check and return true, unless the logging category
qt.widgets.focus is enabled.
Adapt tst_QWidget::focusAbstraction() to enable the logging category.
This amends 58d5d4b7c2.
Fixes: QTBUG-124666
Change-Id: Ia487b381ab45b052638b189bf56acaf4353b1a37
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
913442a75a