Add a "Reset Camera to Normal" button tu the plane widget UI.

The button allows to quickly preset the camera in order it
faces the plane.

Change-Id: I656d10904187a612b7a71b135c707a38e3377842
Merge topic '0015171_camera_front_of_plane_widget' into next

f9f7f24d Add a "Reset Camera to Normal" button tu the plane widget UI.