Added support for setting separate window in fullscreen

app/stylus/components/FullScreenView.styl

@@ -44,10 +44,15 @@
 				height: 5vmin;
 			}
 
-			&.fullscreen {
+			&.exitfullscreen {
 				background-image: url('/resources/images/icon_fullscreen_exit_black.svg');
 				background-color: rgba(#fff, 0.7);
 			}
+
+			&.fullscreen {
+				background-image: url('/resources/images/icon_fullscreen_black.svg');
+				background-color: rgba(#fff, 0.7);
+			}
 		}
 	}