cubicweb-vcsfile #783925 Progress bar for import of repository [open]

Since importing a repo is pretty long, it would be nice to have a progress bar of how far it has already imported the repo. This could be a simple nb_of_revisions_in_cw divided by total_number_of_rev and shown in one of the tabs.

priorityminor
typeenhancement
done in<not specified>
closed by<not specified>