confirm unit delete

[huss]

Is your feature request related to a problem? Please describe.

Other pages such as conversion do a final popup check to verify that a delete is actually wanted. The unit page checks that the unit is safe to delete but does not do a confirm with the admin.

Describe the solution you'd like

After clicking delete, the admin should have to confirm the delete after it is confirmed to be safe. This is what conversion shows:

Describe alternatives you've considered

None

Additional context

None

[mikedivine]

I'll work on this.