Security -> Realms UI shows incorrect saved realm order for Active realms

Steps to reproduce:

1. Add a new Realm to the Active list (LDAP in this example), and move the new realm below the existing Nexus Local realms. The screenshot below shows the order just before Saving: 
2. Click the Save button, and the screen is refreshed and the Active realm order is changed and no longer matches what was saved. In the example below, the LDAP realm is shown first in the list. 

Note:

• despite the different displayed order after clicking Save, the database will store the realm order that was displayed before clicking Save
• if you move the order around, the "Save" button "disables" itself when the order is changed to match the last order that was actually saved