Overview of the flaky auto-tests

To do a quick overview of the flaky tests to check if many of them share same issues/or if they could be solve quickly.

• tst_qquicktextedit::emptyTgads_QTBUG_22058()
• tst_qquicktextedit:::textInput()
• tst_qheaderview::stretchAndRestoreLastSection()
• tst_QShortcut::context()
• tst_qdockwidget::saveAndRestore()
• tst_QMdiArea::tabBetweenSubWindows()
• tst_QAbstractItemview::focusNextOnHide()
• tst_qquicktextedit::setParentChangeFocus()
• tst_QWidget::dumpObjectTree()
• tst_qquicktextedit::inputMethodComposing()
• tst_qquicktextedit::nputMethodUpdate()
• tst_qquicktextedit::cursorDelegateHeight()
• tst_qquicktextedit::cursorDelegate()
• tst_qquicktextedit::overwriteMode()
• tst_qquicktextedit::keySelection()
• tst_qquicktextedit::persistentSelection()
• tst_qquicktextedit::signal_editingFinished()