volunteering admin flask-admin endpoints have changed

[wlcx]

Something is causing the volunteering admin flask-admin endpoints to have changed, which then causes errors when accessing the admin site since urls in the nav can't be generated. This is (presumably?) limited to dev since the main site is working.

Steps to reproduce:

• setup fresh dev site
• Make an admin user
• log in as them, try to go to /admin

The volunteering admin endpoints seem to have changed from e.g. volunteer_admin.index to volunteer_admin_volunteer_admin.index (IIRC, not at same machine atm).

I tracked this down to 2338c05. If you re-add FLASK_APP=dev_server.py to docker-compose.yml, the endpoints are generated as before, which is... yeah.