Upgrading process calls; Tracks library now works like aother asset libraries (huge libraries may kill react-persist?)

src/js/locale/en.yaml

@@ -38,6 +38,7 @@ actions:
   confirm: Are you sure?
   delete: Delete
   remove: Remove
+  cancel: Cancel
 common:
   popularity: Popularity
   name: Name
@@ -117,6 +118,7 @@ services:
     title: Mopidy
     local: Local
     adding_uris: 'Adding %{count} URI(s)'
+    adding_uris_broadcast: '%{username} is adding %{count} URI(s)'
     searching: 'Searching %{provider} %{type}'
     searching_providers: 'Searching %{count} Mopidy providers'
     loading_albums: 'Loading %{count} local albums'