Aheze Setting Versions Save

A couple fixes and improvement. Some of these PRs were made a while ago, but I forgot to release them.

Bug fixes:

• Fix dark theme / optional search bar #21 (thanks @matteozappia and @JohJakob!)
• Fix compile error with non-optional for Swift 5 (@javiergarmon)
• Fix macOS version check #3 (@orchetect)

New features:

• Icon support for SettingButton #12 (@Saik0s, @joekw)
• Conditional NavigationStack support #14 (@mpdifran)
• Menu picker support #10 (@n3d1117)
• Theme entire setting stack #7

Thanks for the PRs everyone!

Introducing Setting, a library for composing beautiful preference panels.

Looking to add a Settings view to your app? Look no further!

Want to upgrade your current Settings view? You're in luck.

https://user-images.githubusercontent.com/49819455/220823342-19826c38-2cc1-486b-abe7-c524dc9f76b4.mp4