[PRQ#78754] Merge Request for xfce-theme-greybird

yochananmarqos [1] filed a request to merge xfce-theme-greybird [2] into greybird-gtk-theme [3]: Rename xfce-theme-greybird to greybird-gtk-theme: As well as Xfce themes, it also includes GNOME, Gtk 2 & Gtk 3 themes. Most other distros also package it as such. [1] https://aur.archlinux.org/account/yochananmarqos/ [2] https://aur.archlinux.org/pkgbase/xfce-theme-greybird/ [3] https://aur.archlinux.org/pkgbase/greybird-gtk-theme/