There are some issues when testing QGraphicsView on GNOME(xorg)
overlapping with the default top bar. This change only move
the view a bit.
Notes:
* There is no CentOS in CI any more.
* panelPropagation() and panelStacksBehindParent() failed in CI
and local vm on Ubuntu 20.04, but only in CI on Ubuntu 22.04.
For example, we can turn the top bar off:
In Extension Manager, install Just Perfection, and disable Panel
in Visibility in it, all tests will pass too.
Task-number: QTBUG-84258
Task-number: QTBUG-103054
Pick-to: 6.4 6.2
Change-Id: I05c262540c85af00182cd142760c4a29554b04c9
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
571e7a41f5