[Media UI] Don't display the torrent menu entry if no torrent plugin is enabled.

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

@@ -8,8 +8,10 @@
                  @seek="seek" @search="search" @mute="toggleMute" @unmute="toggleMute">
         <main>
           <div class="nav-container from tablet" :style="navContainerStyle">
-            <Nav :selected-view="selectedView" @input="selectedView = $event"
-              @toggle="forceShowNav = !forceShowNav" />
+            <Nav :selected-view="selectedView"
+                 :torrent-plugin="torrentPlugin"
+                 @input="selectedView = $event"
+                 @toggle="forceShowNav = !forceShowNav" />
           </div>
 
           <div class="view-container">

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

@@ -4,7 +4,7 @@
       <i class="fa fa-bars" />
     </button>
 
-    <li v-for="(view, name) in views" :key="name" :title="view.displayName"
+    <li v-for="(view, name) in displayedViews" :key="name" :title="view.displayName"
         :class="{selected: name === selectedView}" @click="$emit('input', name)">
       <i :class="view.iconClass" />
     </li>
@@ -24,6 +24,10 @@ export default {
       default: false,
     },
 
+    torrentPlugin: {
+      type: String,
+    },
+
     views: {
       type: Object,
       default: () => {
@@ -46,6 +50,16 @@ export default {
       }
     },
   },
+
+  computed: {
+    displayedViews() {
+      const views = {...this.views}
+      if (!this.torrentPlugin?.length)
+        delete views.torrents
+
+      return views
+    },
+  },
 }
 </script>