move My Submissions to primary nav (bug 860373)

Note that only comment #13 (https://bugzilla.mozilla.org/show_bug.cgi?id=860373#c13) is relevant. The discussion around this minor issue got a bit out of hand and was reined back in.
I see that you're removing this because it's in the header already.

but now we have this menu:

MY SUBMISSIONS | DOCUMENTATION | API | TESTING APPS

it seems arbitrary that besides My Submissions, none of these items exist in the header menu.