Qt keeps track of the selection direction since a selection anchor can be placed
both to the left or to the right of the cursor. On iOS, the selection should
instead always be specified from left to right (using a position together with a
positive length). So when restoring the selection after performing the
calculation of the text rect, we need to ensure that we follow this format.
Change-Id: Id8bea6c35e2781e1431ee963f601b6e9ef05dbf5
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>