Bug#977857: libreoffice-common: On Wayland, it doesn't work without the xwayland pkg but installation does not pull xwayland as a dependency

[Arnoud Dekker]

Thanks to https://wiki.duckcorp.org/index.php/Using_Wayland :
Installing libreoffice-gtk3 made libreoffice work for me on a bullseye 
install running sway and not having xwayland installed.