Afform - fix missing submit actions

This regressed due to 09a3e370 specifying the wrong type.

ext/afform/admin/ang/afGuiEditor/config-form.html

@@ -88,7 +88,7 @@
   </fieldset>
 
   <!--  Submit actions are only applicable to form types with a submit button (exclude blocks and search forms) -->
-  <fieldset ng-if=":: editor.afform.type === 'custom'">
+  <fieldset ng-if=":: editor.afform.type === 'form'">
     <legend>{{:: ts('Submit Actions') }}</legend>
 
     <div class="form-group" >