add to playlist can now check for duplicates, seperated apple music playlists from playlists

src/renderer/style.less

@@ -789,6 +789,14 @@ input[type=range].web-slider::-webkit-slider-runnable-track {
     -webkit-user-drag: element;
     overflow: hidden;
     text-overflow: ellipsis;
+
+    .presentNotice {
+      align-self: center;
+      margin-left: 8px;
+      text-transform: uppercase;
+      font-size: 0.7em;
+      opacity: 0.6;
+    }
   }
 }