fix: Database List Sorted (#15619)

* sorted the database list

* revisions

* cloned the array

* one more time with feeling

* added documentation link as well

superset-frontend/src/views/CRUD/data/database/DatabaseModal/index.tsx

@@ -559,7 +559,7 @@ const DatabaseModal: FunctionComponent<DatabaseModalProps> = ({
         onChange={setDatabaseModel}
         placeholder="Choose a database..."
       >
-        {availableDbs?.databases
+        {[...(availableDbs?.databases || [])]
           ?.sort((a: DatabaseForm, b: DatabaseForm) =>
             a.name.localeCompare(b.name),
           )