Consider shipping libgail-common
Originally created by @spriver on #11841 (Redmine)
While starting applications from the command line (e.g. Tor Browser,
Icedovce, Pidgin, etc.) there’ll be an error: ‘Gtk-Message: Failed to
load module “gail”’ (besides that the applications start without
problems). Installing libgail-common
resolves this error.