Add button to leave meeting

app/stylus/components/Room.styl

@@ -191,7 +191,7 @@
 			background-position: center;
 			background-size: 75%;
 			background-repeat: no-repeat;
-			background-color: rgba(#fff, 0.15);
+			background-color: rgba(#fff, 0.3);
 			cursor: pointer;
 			transition-property: opacity, background-color;
 			transition-duration: 0.15s;
@@ -231,6 +231,10 @@
 					background-image: url('/resources/images/icon_restart_ice__black.svg');
 				}
 			}
+
+			&.leave-meeting {
+				background-image: url('/resources/images/leave-meeting.svg');
+			}
 		}
 	}
 }