Preparing styling and icons

app/stylus/components/Room.styl

@@ -232,6 +232,25 @@
 				}
 			}
 
+			&.screen {
+				&.on {
+					background-image: url('/resources/images/unshare-screen.svg');
+				}
+
+				&.off {
+					background-image: url('/resources/images/share-screen.svg');
+				}
+
+				&.unsupported {
+					background-image: url('/resources/images/unshare-screen.svg');
+					background-color: rgba(#d42241, 0.7);
+				}
+
+				&.need-extension {
+					background-image: url('/resources/images/share-screen.svg');
+				}
+			}
+
 			&.leave-meeting {
 				background-image: url('/resources/images/leave-meeting.svg');
 			}