Retroarch: [Menu] Add a "Horizontal Animation" sublabel

[RobLoach]

Description

There's currently no sublabel for the Horizontal Animation in the menu.

Expected behavior

There should be a sublabel for the Horizontal Animation menu entry, describing what it does and why.

Possibly just the following:

Turning the horizontal menu animations off can result in a performance boost.

Steps to reproduce the bug

1. Run RetroArch
2. Enable Settings -> User Interface -> Advanced Settings in the menu
3. Visit Settings -> User Interface -> Menu
4. Look for a sublabel under the Horizontal Animation entry

Bisect Results

https://github.com/libretro/RetroArch/pull/5172

[Tatsuya79]

I was thinking, now that's the animation has been optimized:
"Make switching between playlists faster on slow devices."
and also
"Disable dynamic wallpapers." if that's the case.

[RobLoach]

Make switching between playlists faster for slow devices.

?

[Tatsuya79]

Yes, feel free to correct my bad English! 😸

[orbea]

@RobLoach I made a PR to add a sublabel, can you please review when you a chance!

https://github.com/libretro/RetroArch/pull/7875

[RobLoach]

Thanks a lot! :+1: