module-default-routes: store/restore route properties

This commit enhance `module-default-routes` so that the route properties
(such as volume, channel map...) are saved on modification, and re-applied
each time a particular route is selected.
3 jobs for default-routes in 54 seconds (queued for 1 second)
Status Job ID Name Coverage
  Container
passed #7696839
container_fedora

00:00:16

 
  Build
passed #7714327
build_on_fedora

00:00:37

failed #7696840
build_on_fedora

00:00:34