Update plex connector
Update plex connector

Use `playerBarSelector` to get track info. We need to use two different selectors, because `playerBarSelector` doesn't generate changes, and cannot be used as a player selector.
Fix parsing current time and track duration.

carpet-berlin/web-scrobbler,inverse/web-scrobbler,david-sabata/web-scrobbler,carpet-berlin/web-scrobbler,david-sabata/web-scrobbler,inverse/web-scrobbler,galeksandrp/web-scrobbler,alexesprit/web-scrobbler,fakelbst/Chrome-Last.fm-Scrobbler,alexesprit/web-scrobbler,galeksandrp/web-scrobbler,fakelbst/Chrome-Last.fm-Scrobbler