Create action when clicking on media cover
Single/double clicking on media posters as they appear on your 'on deck', 'recently added', etc have no effect. Nor is clicking the title or year. The only way to enter the media is to click the play or dropdown menu which is a bit intuitive.
https://www.reddit.com/r/linux/comments/dzh42b/girens_a_gtk_plex_media_player_client_just/f8prg2b/