fix: fixed issue of unable to call handle submit function on button click (#656)

src/export-page/CourseExportPage.scss

@@ -1,8 +1,11 @@
-@import "./export-stepper/ExportStepper";
 @import "./export-footer/ExportFooter";
 
 .export {
   .help-sidebar {
     margin-top: 7.188rem;
   }
+
+  .pgn__stepper-header-step-list {
+    flex-direction: column;
+  }
 }

src/export-page/export-stepper/ExportStepper.scss

@@ -1,3 +0,0 @@
-.pgn__stepper-header-step-list {
-  flex-direction: column;
-}

src/pages-and-resources/discussions/app-config-form/AppConfigFormSaveButton.jsx

@@ -27,7 +27,7 @@ const AppConfigFormSaveButton = ({ intl, labelText }) => {
     // cancelable: (optional) a Boolean indicating whether the event can be canceled. The default is false.
     // cancelable: true cancels the untrusted event and safari, chrome cancel the untrusted event by default
     formRef.current.dispatchEvent(new Event('submit', {
-      cancelable: true,
+      cancelable: true, bubbles: true,
     }));
   }, [formRef]);