Improve the view of unsupported assignments when using Live Activities

[aasalobrena]

When showing live assignments on the main page, the supported assignment codes take their verb form while the unsupported shows like this. It would be great to remove the "staff-" prefix in them.

Also they don't appear in /live and having them like we have in /activities/id would be very useful.

/live:

/activities/id:

Thanks :)