Load the growler.

Even in basic mode, the iTip forms are submitted via Imples, so that Ajax
notifications are used. The page is not reloaded so basic notifications don't
work.

It's of course horribly inconsistent to use the Growler notifications here, but
it's better than not notifying the user at all. And refactoring the iTip viewer
back to work with page reloads in basic mode is a waste of time.
Close the form after the top, not the bottom navbar (Bug #12677).

If we close the form at the bottom of the page, this breaks any forms embedded
in MIME views. And it's not necessary to have the form fields of the bottom
navbar inside the action form anyway, because any form handling is setting
hidden fields or updating fields in the other navbar via JS now.
[jan] Fix iTip MIME viewer actions in basic view (Bug #12677).