[Permissions] Allow sub-account Admins to reset student passwords

Problem statement:

Allow sub-account Admins to reset student passwords.

Proposed solution:

Since sub-account Admins already have permission to view the "People" section of the sub-account, they should be allowed to reset a sub-account user's password; namely, the ability to reset Student passwords. Students often forget their passwords and using the system reset from the Login page does not always "work" -- emails may be blocked by the school server, not received at all by students, or may not get to students in a timely manner.

User role(s):

admin