It should not be possible to delete Licenses with attached Agreements

Overview:
Steps to Reproduce:

1. Login with user that has CRUD permissions in both Agreements and Licenses
2. Create a License
3. Create an Agreement
4. Link License to Agreement
5. Navigate to License
6. Attempt to delete license - note that license is not deleted, although user is not told why
7. Login with a user that has CRUD permissions in Licenses but no permissions in Agreements
8. View license
9. Note that license shows as having zero related agreements even though there is a related agreement
10. Attempt to delete license
11. Note that license is deleted even though there is a linked license

Expected Results:

1. If a user does not have permission to view agreements AND mod-agreements is installed, the user should see a message that they do not have permission to view licenses in the "Agreements linked to this license" section
2. No matter what permissions the user has, if a user attempts to delete a license with a linked agreement, they should be told that they cannot delete the license because of a linked agreements. This warning, and the non-deletion of the license should not be dependent of them being able to view or edit agreements
3. If there are no agreements related to a license, the user should be able to delete the license even if they do not have permissions to view or edit agreements

Actual Results:
Additional Information:
URL:
Interested parties: