Steps to reproduce:

1. Go to Administration > Authentication > LDAP settings
2. Enter Login / User Password to test 'LDAP settings'.
3. Click Update

Result:
Theme is most noticeable change back to Blue from Dark. Settings under General are changed back to default such as GUI, HouseKeeping, Trigger displaying options.

Macros are unaffected, e.g. SNMP_COMMUNITY

Expected:
No change in general settings only LDAP settings.