When executing the test in a sequence (as done by make check after
tst_qstackedlayout), tst_QToolTip::task183679 often fails since
apparently the tooltip is hidden when the cursor is near it.
Move to the cursor to the right corner of the widget to fix this.
Change-Id: I3b13239e77cb387f1b1425fab79c8d6faa27b5bb
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>