Disable tab highlight

By accident commited too early, with wrong value.
No tab highlight increases the performance, its not required anyway.

src/App.vue

@@ -47,7 +47,7 @@
 		background-color: #111;
 		color: #aaa;
 		margin: 0;
-		-webkit-tap-highlight-color: #f0ff;
+		-webkit-tap-highlight-color: #f0f0;
 	}
 
 	body a:link {