* the captions popup allows operation outside of the popup
* improved caption index search on seek
* in PlayerDetailed and EpisodeInfo, fixed possibly building description webview multiple times
* put more small db writes into IO dispatcher
* on some player errors, remove cached media specs
* on feed full refresh
	* ensure to update episodes' transcript meta and aiContent
	* ensure episodes' full description are not reset
* ensure to update feeds' medium and aiContent on refresh
