Cannot de-register an offline CA via the UI
Steps to reproduce
Regression (lost feature) from 1.6.x.
Steps to reproduce:
1. Set up a CA
2. Take the CA offline
CA shows under Locations and cannot be removed.
Should be an action available to de-register the CA if the CA state is offline.
Workaround (if any):
Use the REST endpoint, or use the old admin UI.