Fix lobby not displaying in HMD mode

This usage of Glower is similar to that in renderAvatarBillboard(). Both
may indicate that something needs changing in the graphics pipeline.

interface/src/Application.cpp

@@ -3241,6 +3241,7 @@ void Application::displaySide(Camera& theCamera, bool selfAvatarOnly, RenderArgs
     {
         PerformanceTimer perfTimer("3dOverlaysFront");
         glClear(GL_DEPTH_BUFFER_BIT);
+        Glower glower;  // Sets alpha to 1.0
         _overlays.renderWorld(true);
     }
     activeRenderingThread = nullptr;