Behaviour changes:
* Migrate the genius.com source from web scraping to using the API
* Enforce a limit on the number of search results returned from LRCLib
* Add a label to the root preferences page prompting to check the subpages

Bug fixes:
* Fix a crash when trying to show lyrics for a track with none saved
* Fix letras.com returning random lyrics when a good match isn't found
* Fix SongLyrics.com still returning lyrics saying there are no lyrics
* Fix a potential crash while hashing for metrics or LRCLib upload
* Fix the editor occasionally producing an invalid timestamp on line sync
* Fix some users being spammed with info-level logs on startup