[OS X]: When there is a QOpenGLWidget in use inside a QMainWindow then the drawing of focus frames can be done incorrectly

[OS X]: When there is a QOpenGLWidget in use inside a QMainWindow then the drawing of focus frames can be done incorrectly. What happens is that the widget in a QDockWidget gets the focus and it is possible that this focus frame ends up being drawn on the top of the other widgets rather than being appropriately clipped.

In the example do the following:

• Dock the dockwidget on the left
• Resize the dockwidget to be as small as it can be
• Click on the widget in the dockwidget so that it has focus (you should see the blue focus frame correctly clipped)
• Resize the dock widget and note the focus frame becomes visible even though it should be clipped still on the right hand side (app switching and back results in the same issue)