Onboarding - Tell uninav to update profile pic after saving a new one

[jmgasper]

We can tell the uni nav to update itself after we make changes, which we should do when the photoURL is set after the user uploads a new profile picture.

It looks like this:

tcUniNav('update', '*', {user: 
                email: profile.email,
                firstName: profile.firstName,
                handle: profile.handle,
                lastName: profile.lastName,
                photoUrl: profile.photoURL,
                userId: profile.userId,
})

Note that we make a similar call in the new profiles app when saving work, education, profile pic, etc..

[suppermancool]

@jmgasper done in #782