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.
we should be consistent though. keep both the Submit a New App and the My Submissions links in the header nav or keep both those links in the white nav.

my eyes always gravitate to the white nav. it's easier to read and more prominent. users will eventually notice that we moved the links to the top nav.

the title of this bug is "Bug 860373 - No obvious link to "My Submissions" or "App Validator" in devhub from dashboard" and there are mockups to redesign the entire nav. I agree with your approach to repurpose this bug to handle only the "My Submissions" page. we do need to file a bug to add the "App Validator" link, among others. so, what's the long-term plan?