Credits support

[jacksongoode]

You can also click on the artists to get to their page!

[jacksongoode]

@SO9010 Wanted to get this one in but we still need to make sure that clicking credits while there is already a credits window, we don't spawn another.

[SO9010]

@jacksongoode I'll have a look at this, but I also think the UI should be consistent with the preferences window if we have a pop-up open. Otherwise, it looks a bit out of place.

Also, I think we should consider changing the order of the right-click context menu. The contexts in the top section are related to going to the track's artist and the album, so maybe we should place it above or below those two contexts.
I also feel that without doing this, people's muscle memory would get in the way of adding the song to their playlist, as that has always been at the bottom.

Maybe the copy link to track should get moved down to the lower section.

However, it could also be ordered as a list of priority to the user, and maybe we could flip it all the way around so that as soon as the user right-clicks on the track, they can add it to a playlist. This could maybe improve UX? Up to you.