Instead of hiding this option when the current playlist
is unsaved, we can offer to save the playlist, if
necessary, before attempting to create a bookmark.
This simplifies the workflow by getting rid of steps 1
and 2 that a user currently needs to perform:
1) Open context menu, check if "Create Bookmark" option
is available
2) If not: Re-open context menu. Select Current Playlist
-> Save Current Playlist
3) Re-open context menu. Select Bookmarks
-> Create Bookmark
Change-Id: Ia9fb5f9db95e2fcbde03470a3c3745824424a339
ef1e7d8896