This way, every time we touch our Menu.xml the page's breadcrumbs
are automatically switched.  :)

While there, clean the old $pgtitle setup so all of them translate
properly.  They are still used for the menu bar title, that will
require more effort to unfold.  Stay tuned.

@adschellevis if this is not the correct way to do it feel free
to refactor the MVC parts.