Bug 1037415 - remove existing webrtc indicator in the browser toolbar r=florian, a=sledru
Bug 1041663 - handle dragging the global webrtc sharing indicator, r=dolske, a=sledru.
Bug 1041685 - show hidpi icons in the mac global webrtc sharing indicator, r=dolske, a=sledru.
Bug 1041687 - replace place holder screensharing icons with final icons, r=dolske, a=sledru.
Bug 1042163 - Visual issues with the global indicator for screen/device sharing, r=Gijs, a=sledru.
Bug 1041667 - Fix positioning of the global webrtc sharing indicator if there are multiple screens, r=dolske, a=sledru.