This page plays the role of WPOLOMController inside the appFrame. Serve it
from a different origin than the parent (e.g. via
https://test-pages.menlotest.com/sv_www/manual-test/...) to get
the cross-origin hop. The button below navigates THIS frame to the PDF -
same as the WPO portal's FIFORMSET form (action=WPOLMEController, no
target attribute).