MDL-73205 forms: handle AJAX error in dynamic/modal form submission.

lib/form/amd/src/dynamicform.js

@@ -247,7 +247,7 @@ export default class DynamicForm {
         })
         .then((resp) => this.updateForm(resp))
         .finally(pendingPromise.resolve)
-        .catch(this.onSubmitError);
+        .catch(exception => this.onSubmitError(exception));
     }
 
     /**
@@ -389,6 +389,6 @@ export default class DynamicForm {
             }
             return null;
         })
-        .catch(this.onSubmitError);
+        .catch(exception => this.onSubmitError(exception));
     }
 }

lib/form/amd/src/modalform.js

@@ -402,7 +402,7 @@ export default class ModalForm {
             }
             return null;
         })
-        .catch(this.onSubmitError);
+        .catch(exception => this.onSubmitError(exception));
     }
 
     /**