-Fixed bookmark button flickering on visibility toggling.
-Removed toolbar up button control from local fragments, delegating functionality back to main fragment.
-Updated extractor to latest.
-Added LeakCanary as part of debug build.
-Modified bookmark list to show both remote and local playlists.
-Removed ability to save channel items as local playlist, in favor of subscribe.
-Added playlist append menu item to channel and playlist fragments.
-Added debouncing to local playlist fragment to allow saving join when list is reordered or item is deleted.
-Extracted hardcoded strings.
