Resolve "Following channel with fediverse address not working"
Closes #1294 (closed) Closes #1295 (closed)
Currently the feed type 'RSS' is explicitly passed in the subscriptions page and podcast page. This means that unless the user makes use of the search bar they cannot easily paste in fediverse addresses.
This change adds a check to see if the type is undefined or both, and presents the user the option to choose either rss or artists to ensure that they can subscribe to both types of channel easily.
Also adds a change to the Modal focus trap to ensure it is deactivated on modal close, otherwise elements cannot be interacted-with after opening a modal.