* in OnlineFeed, improved routine for checking existing feed
* ensure stream/play buttons react promptly
* in YT captions meta list, kind is shown
* amended captions overlay, when expanded, added a search bar to search and jump to the caption
* ensure keyboard closes on complete or cancel
* in Settings->Playback, when changing cache size, pop up confirmation for app restart
* in MediaPlayer, on Access denied (403) error, prompt to try again
