gnome-core depends on many priority:extra packages

[Martin-Éric Racine]

Dear GNOME maintainers,

It appears that an increasing amount of packages upon which gnome-core
Depends have been lowered to priority:extra. This would require
adjustments as per Debian Policy 2.5:

"Packages must NOT depend on packages with lower priority values
(excluding build-time dependencies). In order to ensure this, the
priorities of one or more packages may need to be adjusted."

Best Regards,
Martin-Éric RACINE