PanelRulerView: drop unused parent argument
A parent argument for a window has a different meaning than for regular QObjects. There is no reason to create a PanelRulerView as a subsurface.
(cherry picked from commit d057eb6a)
A parent argument for a window has a different meaning than for regular QObjects. There is no reason to create a PanelRulerView as a subsurface.
(cherry picked from commit d057eb6a)