Patches to bring back a traditional experience for GTK 3.

- See: https://gist.github.com/luigifab/0fce786cdb93b5687069a82f490ea95e
- See also: https://github.com/lah7/gtk3-classic
- Source of orig file: https://packages.debian.org/source/trixie/gtk+3.0
- DEB packages: https://download.opensuse.org/repositories/home:/luigifab/Debian_Testing/amd64/

USAGE FOR DEBIAN TESTING:

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1/ add the gpg key:

`wget -qO - https://build.opensuse.org/projects/home:luigifab/signing_keys/download?kind=gpg | sudo apt-key add -`

or

`wget -qO - https://build.opensuse.org/projects/home:luigifab/signing_keys/download?kind=gpg | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/luigifab-opoensuse.gpg`

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2/ add in your /etc/apt/sources.list (arch= amd64 or arm64 or armhf or i386 or ppc64el):

`deb [arch=amd64] https://download.opensuse.org/repositories/home:/luigifab/Debian_Testing/ ./`

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3/ add in your /etc/apt/preferences:

```
Package: *gtk*
Pin: origin download.opensuse.org
Pin-Priority: 850

Package: *gail*
Pin: origin download.opensuse.org
Pin-Priority: 850
```

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4/ refresh packages lists and apply updates