Improved import flow, Empty pager view support, No subscriptions result view, LoginRequiredException support

Loop support, Improve add to queue behavior, home retry, fix history search pager, defaults progressbar

WIP DBStore

See merge request !8

ManagedDBSTore delete corrupted items, Fix serialized content serializer, Fix notifications wrong intent

DBStore improvements, query like support, more unittest, refactor into StateHistory, history indexes

Chromecast protobuf cleanup and fixed Odysee content-types being misrepresented causing casting to desktop to break.

Fixed gesture control issues causing wrong area to have gesture controls and disabled full screen gesture when casting.