Adding LDAP test connection button. Reordering LDAP settings. (#3912)

webapp/components/admin_console/admin_sidebar.jsx

@@ -207,7 +207,7 @@ export default class AdminSidebar extends React.Component {
                         title={
                             <FormattedMessage
                                 id='admin.sidebar.ldap'
-                                defaultMessage='LDAP'
+                                defaultMessage='AD/LDAP'
                             />
                         }
                     />