feat: Add new plugin Album actions

[MiepHD]

Adds Undislike, Dislike, Like and Unlike buttons to apply this to all songs in a playlist or album.

Fixes #831

[ArjixWasTaken]

Don't add enabled: true in the config....
Your plugin must not be enabled unless specified otherwise by the user's config.

[MiepHD]

I enabled it by default because it just adds these buttons to the UI. If you don't click the buttons nothing happens. But I can remove that if that's a problem

[ArjixWasTaken]

Since it does not fix a bug, I consider it an additional feature.
I guess I'll leave it up to @JellyBrick

[JellyBrick]

The shapes of the buttons can be confusing to users.

[MiepHD]

Why? Should I add an explanation what they do?

[JellyBrick]

What about showing just one of each button? (1 dislike button, 1 like button)

• If any item is "Liked", show a filled "Like" button; if any item is "Disliked", show a filled "Dislike" button
• If both "Liked" and "Disliked" are checked, show both filled buttons

[MiepHD]

Now it shows a

• undislike button if any item is disliked
• dislike button if any item isn't disliked
• like button if any item isn't liked
• unlike button if any item is liked

[inson1]

@MiepHD Great work!

Now it shows a

• undislike button if any item is disliked
• dislike button if any item isn't disliked
• like button if any item isn't liked
• unlike button if any item is liked

Just another opinion. I hope you dont mind :) That is standard, yes, but it isnt perfect :/.

What about highlighted (bold lines?) like/dislike button if some are liked/disliked, but not all? (I think that is also used somewhere in some app) Or something like that? Maybe like/dislike button with full white, but black "ball" inside?

Just something so normal user would get it and "profi" user would know if all songs are liked or disliked.
Or another mode for this?

[Su-Yong]

It seems memory leak bug