HoverHandler does not react to button presses. Images to indicate button
presses are loaded but never shown because of this. This patch adds an
additional PointHandler which reacts to button presses.
Pick-to: 6.5
Change-Id: I60c1daef5144d7431605b0dc7dbedc0723a17fe0
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>