Fixed the issue with the screen not darkening after opening one of the menus...

Fixed the issue with the screen not darkening after opening one of the menus while the other one is open.

bigbluebutton-html5/app/client/main.coffee

@@ -56,18 +56,20 @@ Template.header.events
     if isLandscape()
       toggleUsersList()
     else
-      toggleShield()
       if $('.sl-right-drawer').hasClass('sl-right-drawer-out')
         toggleRightDrawer()
         toggleRightArrowClockwise()
+      else
+        toggleShield()
       toggleLeftDrawer()
       toggleLeftArrowClockwise()
 
   "click .toggleMenuButton": (event) ->
-    toggleShield()
     if $('.sl-left-drawer').hasClass('sl-left-drawer-out')
       toggleLeftDrawer()
       toggleLeftArrowClockwise()
+    else
+      toggleShield()
     toggleRightDrawer()
     toggleRightArrowClockwise()