Description of problem:
Currently users have no way to know whether the requests has been granted or reject; nor does the grantor have convenient methods to tell the requesters they requests have been rejected or need more information.
For example, user A requests a translator permission in fr team; but if language coordinator wants to reject the request, the coordinator have no way to tell user A in Zanata.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Sign in as a coordinator
2. Go to language team he/she coordinate.
3. User A request for permission to join the language team.
There is no way to telling User A that the permission is rejected.
A choice should be given:
"Ok" for grant the request
"Reject" for reject the request
"More Info" for require more information
"Cancel" (Optional) Pending the decision.