Don't allow users to Reject their own extension
Users have been discouraged from using the
Reject action on their own extensions for quite awhile. This disrupts the diff review flow since new submissions need to be manually checked to ensure we don't miss buggy/malicious in a version rejected by a user.
Since we reject intermediate or obsolete versions anyways, the
Reject option should be restricted to those who can use the
Approve action. Users can still use the
Inactive toggle if they need.