fix(client): selector return, invalid prop val (#49447)

* fix(client): correctly return type from selector

* fix(client): remove incorrect prop [button-spacer]

client/src/components/formHelpers/form.tsx

@@ -103,7 +103,6 @@ export const StrictSolutionForm = ({
           <FormFields formFields={formFields} options={options} />
           <BlockSaveButton
             disabled={(pristine && !enableSubmit) || (error as boolean)}
-            bgSize='none'
           >
             {buttonText}
           </BlockSaveButton>

client/src/templates/Challenges/redux/selectors.js

@@ -101,6 +101,10 @@ export const currentBlockIdsSelector = state => {
     challengeType
   );
 
+  if (!currentBlockIds) {
+    return [];
+  }
+
   return currentBlockIds;
 };