accessDialog: Change fallback button labels
All the new portals dialog mockups have "Deny/Allow" buttons. Rename them.
https://gitlab.gnome.org/Teams/Design/os-mockups/-/blob/master/portals/portals.png
All the new portals dialog mockups have "Deny/Allow" buttons. Rename them.
https://gitlab.gnome.org/Teams/Design/os-mockups/-/blob/master/portals/portals.png