Display member of private group.

Bug found by will while testing rc4
Test 1:
 * Log in as user-2
 * Click on Display groups in the tool bar
 * Mouse over private-1 to display the users.
 * Make sure:
    * user-2 is selected and displayed under members
    * No other members are displayed
    * Show All users option is not available

Test 2:
 * Log as user-6 (Admin)
 * Click on Display groups in the tool bar
 * Select private-1 to display the users.
 * Make sure:
    * user-6 is selected
    * All members are displayed
    * Show All users option is available

Test 3:
 * Log in as user-1 (group-owner)
 * Click on Display groups in the tool bar
 * Mouse over private-1 to display the users.
 * Make sure:
    * user-1 is selected
    * All members are displayed
    * Show All users option is available