Profile editor improvements

Several changes related to a restructure in the vier theme. See pull request: https://github.com/annando/vier/pull/2

Includes:

* Labels for different sections in the profile editor. [screenshot](https://camo.githubusercontent.com/a7656434800098c169c6f4a051612ba12086b563/687474703a2f2f73732e6f7363702e696e666f2f323031342d30392d30355f30302d31332d33362e706e67)
* Edit profile button definition.
* Redirects from the profile-list to your main profile, if multiple profiles is disabled.