gnome3.gnome-control-center: Add mutter keybindings

Closes: https://github.com/NixOS/nixpkgs/issues/19590

pkgs/desktops/gnome-3/core/gnome-control-center/default.nix

@@ -9,7 +9,7 @@
 , gtk3, glib, glib-networking, gsettings-desktop-schemas
 , gnome-desktop, gnome-settings-daemon, gnome-online-accounts
 , vino, gnome-bluetooth, tracker, adwaita-icon-theme
-, udisks2, gsound, libhandy, cups }:
+, udisks2, gsound, libhandy, cups, mutter }:
 
 stdenv.mkDerivation rec {
   pname = "gnome-control-center";
@@ -60,6 +60,8 @@ stdenv.mkDerivation rec {
       # Thumbnailers (for setting user profile pictures)
       --prefix XDG_DATA_DIRS : "${gdk_pixbuf}/share"
       --prefix XDG_DATA_DIRS : "${librsvg}/share"
+      # WM keyboard shortcuts
+      --prefix XDG_DATA_DIRS : "${mutter}/share"
     )
     for i in $out/share/applications/*; do
       substituteInPlace $i --replace "Exec=gnome-control-center" "Exec=$out/bin/gnome-control-center"