Allow settings value to be nullified (#8596)

* Allow settings value to be nullified

* Additional null check

* Bump API version

* Fix for unit test

src/frontend/src/components/settings/SettingList.tsx

@@ -68,6 +68,7 @@ export function SettingList({
     fields: {
       value: {
         field_type: fieldType,
+        required: setting?.required ?? false,
         label: setting?.name,
         description: setting?.description,
         api_url: setting?.api_url ?? '',