Add quick back to desktop on setting

[BHD1673]

pls adding it

[1280px]

If you're talking about the "Show Desktop" button, then:

1. Duplicate of add visible desktop button on bottom right like in win 7 pls #84
2. There's already a pull request to implement it, but for some reason it's been in drafted state for over a year now. However, you can compile it yourself, or fork xoascf's fork and download autocompiled version from thw "Actions" tab.

[dremin]

Duplicate of #84