admin: auth: make sure list of auth modules is consistent When authentication modules are enabled, but fail to be enabled e.g. due to missing dependencies (pam, ldap), the list of enabled plugins still contains the failing module. However, the 'Enabled/Disabled' button correctly shows Disabled, causing a mismatch between both. Worse, the mismatch cannot be corrected by clicking the Enabled/Disabled button, one needs to manually clear the problematic entry in the list of enabled plugins. Fix by always populating the list with the actually enabled plugins, not those requested by the user in case there are failures.