tvOS: Retrieve the correct media title on tvOS & Add search bar to the download subtitles view

This merge request brings a fix to:

• The media title that is now properly retrieved with the micro media library service on tvOS.

Closes #1895 (closed)

Screenshots

This merge request also brings the addition of:

• A search bar to the download subtitles view allowing users to search subtitles matching with a specific title.

Closes #1896 (closed)

Screenshots