Set the parent component of a PopupMenu submenu in showSubMenuFor()

modules/juce_gui_basics/menus/juce_PopupMenu.cpp

@@ -912,7 +912,8 @@ struct MenuWindow  : public Component
             activeSubMenu.reset (new HelperClasses::MenuWindow (*(childComp->item.subMenu), this,
                                                                 options.withTargetScreenArea (childComp->getScreenBounds())
                                                                        .withMinimumWidth (0)
-                                                                       .withTargetComponent (nullptr),
+                                                                       .withTargetComponent (nullptr)
+                                                                       .withParentComponent (parentComponent),
                                                                 false, dismissOnMouseUp, managerOfChosenCommand, scaleFactor));
 
             activeSubMenu->setVisible (true); // (must be called before enterModalState on Windows to avoid DropShadower confusion)