gnomeExtensions.dash-to-dock: switch to fork to make it work with GNOME 40

[mohe2015]

Motivation for this change

Extension doesn't work at all currently.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• 21.11 Release Notes (or backporting 21.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/cant-seem-to-use-make-due-to-glib-compile-schemas/14866/2

[mohe2015]

Should we possibly backport this if it's also not working at all in 21.05?

[jtojnar]

This is still unfinished branch and it is quite buggy.

[mohe2015]

Should this be reverted after branchoff? I'm not using gnome anymore but I don't know if we want this buggy unofficial forks in a release. Not working at all is not good either though.

[mohe2015]

On my phone so I didn't see this at first but micheleg/dash-to-dock#1402 (comment) there probably will be a release soon