Edit3D: clicking on object doesn't always register a pick when it should

To repro: Add View3D and add a sphere into the scene. Move the sphere away from origin and click back and forth between sphere and the default cube. Clicking on the sphere when cube is selected just deselects the cube instead of selecting the sphere. Another click on the sphere selects it. If there is no selection, sphere is always selected properly. Similarly just clicking on the selected sphere sometimes deselects it, but not always.

Initial debugging reveals that viewRoot.editView.pick() call returns null result in problem cases, so the actual problem probably is on quick3D side. However, it seems to be somehow related to the gizmo, as cubes only have this issue when scale gizmo is active, so keeping it on QDS for now.