macosx: Only react to user interaction in title and chapter sidebar table view

Prevents the playback of the item being reset to the first title or chapter when the respective view is opened and loaded for the first time. Caused by the table view selection changing on initialisation

After fix:

Screen_Recording_2024-11-02_at_00.23.12

Before fix:

Screen_Recording_2024-11-02_at_00.38.55

Signed-off-by: Claudio Cambra developer@claudiocambra.com