Resolve #3438379 "Set referringitem in"

Closes #3438379

src/Contracts/ComponentFormInterface.php

@@ -98,9 +98,9 @@ interface ComponentFormInterface extends FormInterface {
   public function successfulAjaxSubmit(array $form, FormStateInterface $form_state);
 
   /**
-   * Get the form view mode.
+   * Get the form mode.
    */
-  public function getFormViewMode();
+  public function getFormMode();
 
   /**
    * Set the form view mode.
@@ -108,6 +108,6 @@ interface ComponentFormInterface extends FormInterface {
    * @param string $view_mode
    *   The view mode.
    */
-  public function setFormViewMode($view_mode);
+  public function setFormMode($view_mode);
 
 }