Replace "Now Playing" with Album Title if Album Title exists

[imgde]

Always felt that the "Now Playing" is just a waste of space.

Closes issue #708.

• This does show "Now Playing" if the song doesn't have an Album Title linked to it.
• This should show "Now Playing" if there is nothing playing. I wasn't able to test this, but I'm sure enough it works.

[zyrouge]

The tab title is supposed to be indicating what tab it is. This change makes it awkward for this certain tab. Showing album title somewhere along the artist names would be much better. I'll close this, let me know if you have any other opinions. :)

[imgde]

I personally like this much more but tastes differ. Maybe add it for people who want it aswell but can't/don't want to code (e.g. #708) as a customization option instead?