[media UI] Added loading spin overlay upon play.

platypush/backend/http/webapp/src/components/panels/Media/Index.vue

@@ -195,15 +195,28 @@ export default {
     async play(item) {
       if (item?.type === 'torrent') {
         this.awaitingPlayTorrent = item.url
+        this.notify({
+          text: 'Torrent queued for download',
+          image: {
+            iconClass: 'fa fa-magnet',
+          }
+        })
+
         await this.download(item)
         return
       }
 
+      this.loading = true
+
+      try {
         if (!this.selectedPlayer.component.supports(item))
           item = await this.startStreaming(item, this.pluginName)
 
         await this.selectedPlayer.component.play(item, this.selectedSubtitles, this.selectedPlayer)
         await this.refresh()
+      } finally {
+        this.loading = false
+      }
     },
 
     async pause() {