DO NOT MERGE #676 and #675 in progress

I have implemented notices page parsing and navigation, but there are some problems.

Most notably, I managed to get a notif out of katello only when I used ui/create or ui/delete.

rest/create and /delete supply no notifs, and I haven't yet managed to set up (provision/with-client to check whether it would fire notifications in katello.

In tcms, it specifies, that subscription-manager register --username=$username --password=$password --org=$Org --environment=$Env on client shoud fire a notif in katello-ui