[UX] Automatically update the "Admin Content" view to include language field and exposed filter when more than one language is enabled for the site.

In #1574, while helping @bd0bd out, I saw that it was not clear to him (average new Drupal/Backdrop user coming from another CMS) why he could not filter the available content by language. This page is generated by a view and the process of adding the content language as a field and a filter criterion is pretty straight-forward for a views ninja, but obviously not to new users.

Wouldn't it make sense to have the view automatically updated to include the "Content: Language" field and a respective exposed filter once the user added a second language to their site? My only concern is how we should handle the reverse operation (if the user removed all but a single language from their site). Would we want to remove the filters from the view?

Anyways, how would something like this be possible? Update hooks?