gimp/menus/images-menu.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE ui SYSTEM "gtkuimanager.dtd">

<ui>
  <popup action="images-popup">
    <menuitem action="images-raise-views" />
    <menuitem action="images-new-view" />
    <menuitem action="images-delete" />
  </popup>
</ui>