Introduce PlexConnect filter for Subtitle language and Audio language

plexconnect

#1

In the new Plex Media Server version filters for Subtitle language and Audio language are available. I'd like to use this filters under "More" in the list of:
- Recently Viewed
- By Year
- By Country
- By Content Rating
- By Rating
- By Resolution
- By First Letter
- By Subtitle language
- By Audio language


#2

Thanks. Created issue #525 in Github.