All users can View Development Panel if View Development Tools permission is granted to a User/Group Picker custom field

Steps to reproduce

1. Grant View Development Tools permission to the followings:
   • a single user, e.g. sysadmin
   • a user picker or group picker custom field, which has no default value (to make sure the field is empty upon issue creation)
2. As a comparison, grant Assign Issues permission to only the user picker or group picker custom field
3. Connect JIRA to Stash, Github, Bitbucket, Bamboo, FeCru, Subversion, etc.
4. Create a new JIRA ticket, and mention that ticket in several commit messages from the linked applications

Expected behavior

Only sysadmin can view the Development Panel if no user/group has been added to the user/group picker custom field

Actual behavior

Any user can view the Development Panel as well as the commits' detailed info:

Notes

• From the above images, the user can only view the Development Panel and the commits' detailed info
• He doesn't see the Assign button, meaning that he doesn't have the Assign Issues permission
• He doesn't see the Development tabs like Source, Reviews, Builds, Subversion
• If the user is added to the user/group picker custom field, then he has the Assign Issues permission as well as can see the Development tabs:
•