Useful and informative UI improvement, but could use some polish

AppleSkin does not need an introduction, I feel, since it is ubiquitous and includes in almost every popular modpack out there.

I will therefore cut the well-deserved praise short for this review: it's an excellent UI improvement adding vital saturation and hunger information, it is integrated seamlessly into the UI and it honestly should be in the vanilla game already.

However, I do feel like it could use some polish in the visual department.

The main issue is that AppleSkin just does not work gracefully with resource packs that change the hunger icon. The saturation icons rendered behind the hunger bar are just the vanilla 'chicken leg' hunger icon reduced to a yellow outline. This looks good in vanilla. But if you use a resource pack that modifies the hunger icons to be a different shape, AppleSkin will still behave like an elephant in a porcelain shop and render the vanilla 'chicken leg'-shaped outline behind the differently-shaped custom hunger bar icons, essentially clashing with and clipping into them.

It would not be too difficult a task to generate these icons dynamically based on the currently active resources. After all, it's just a simple yellow outline that you could generate for any arbitrary shape easily.

Additionally, the saturation scale behind the hunger bar is a simple dithered gray rectangle that in my opinion can look quite busy and jarring. A more modern style would do well here.

Overall though, AppleSkin is obviously still a must-have, and there are plenty of resource packs out there that add compatibility for AppleSkin icons too. It's just a minor annoyance that you can't really use some resource packs with AppleSkin because of the overlapping texture issue.