Fixed|UI|Client: Show projected mouse cursor in all displacing VR modes

All VR modes that move window content around should use the custom cursor
since it will then be appropriately duplicated in the per-eye views.

IssueID #1941

doomsday/apps/client/src/ui/clientwindow.cpp

@@ -787,8 +787,9 @@ DENG2_PIMPL(ClientWindow)
     void updateMouseCursor()
     {
         // The cursor is only needed if the content is warped.
-        cursor->show(!self.canvas().isMouseTrapped() && vrCfg().mode() == VRConfig::OculusRift);
+        cursor->show(!self.canvas().isMouseTrapped() && VRConfig::modeAppliesDisplacement(vrCfg().mode()));
 
+        // Show or hide the native mouse cursor.
         if(cursor->isVisible())
         {
             if(!cursorHasBeenHidden)