Manipulator: changes for overlay options

There are now 3 categories in the overlay popover:

- Navigation
- Active (camera, lamp... etc)
- Tool (manipulator)

The user preference for mini axis now controls if the mini axis
displays minimal or a full-interactive widget.

Part of design: T55863

source/blender/editors/interface/resources.c

@@ -1383,7 +1383,7 @@ void init_userdef_do_versions(Main *bmain)
 		if (U.rvisize == 0) {
 			U.rvisize = 15;
 			U.rvibright = 8;
-			U.uiflag |= USER_SHOW_ROTVIEWICON;
+			U.uiflag |= USER_SHOW_MANIPULATOR_AXIS;
 		}
 
 	}