Rewrite manual trakt sync to be faster.
Also manually sync collected episodes with trakt.
Only schedule sync if none pending, abort sync if just synced.
Temporarily allow syncing single shows without back-off again.
Do not even schedule a sync if time is not right (again).
Re-add trakt and tvtag icons in check-in dialog.
Add hint that tvtag was named GetGlue.
Merge branch 'beta' into periodic-full-trakt-sync
Run a full sync with trakt ca. every 24 hours or if user requested sync.
Merge branch 'periodic-full-trakt-sync' into beta
Trakt upload could leak resources, also re-use show service.