message: Re-structure application template
diff: {{title (t 'general.OSF')}}
  -<div class="{{routeStyleNamespaceClassSet}} Application">
  +<div class="Application">
  {{new-osf-navbar signupUrl=signupUrl loginAction=(action 'login')}}
  <div id="secondaryNavbar"></div>
  {{maintenance-banner}}
  - <div class="Application__page">
  + <div class="{{routeStyleNamespaceClassSet}} Application__page">
  {{outlet}}
  </div>
  -</div>
  {{osf-footer}}
  {{osf-copyright class='text-center'}}
  {{osf-mode-footer}}
  +</div>
  