add click interaction animation for player controls

src/components/player/PlayerControls.vue

@@ -61,6 +61,10 @@
     pointer-events: none;
   }
 
+  .player-control:active {
+    transform: scale(.9) !important;
+  }
+
   .player-control:hover,
   .player-control:focus {
     color: #fff;