Add ability for a custom favorites list
Description
While any radio can be played by filling in the URL in the top of the player view, and this gets remembered across restarts, this allows only one station as "favorite" till it is changed. Radioknop.nl integration gives a list of extra radios, but there are more radios out there.
Proposed solution
Add a local database that replicates the same functionality as Radioknop.nl, but can be edited by the user.