Issue title: [Feature Request] Add ability to customise website used for actor bios
 Issue body: When tapping an actor on the "Now Playing" page it's a nice feature that this opens up their IMDB profile to discover more. It would be great if there was a way to customise the website used for artist bios, for instance to switch to Wikipedia as an alternative.
 Comments: 
 Comment 0: Not the same, but IMdb link has been replaced by a generic Google Search. It's not what is referred here, but i believe it's more versatile and probably satisfies the user.
Anyway, i'm not a fan of including a specific customization for this, as it doesn't seem to be a generalized request.
{'source': 'GithubIssues', 'repo_name_with_owner': 'xbmc/Kore', 'issue_id': 283395416, 'repo_stars': 551.0}