Removed 'problems loading site' text in SetupBarView

- Paul mentioned that he'd rather like the page to just load and work,
  instead of having a message implying that loading the page doesn't always work.
  Since we're using sessionStorage rather than localStorage,
  we currently don't have problems with old states of the page existing
  for longer than the session, and thus localStorage doesn't need to be cleaned.
ContributorView works again

- In ContributorView, the Renderer shall not update the fragment as this leads to a redirection away from ContributorView.
- I could also correct a regex in StudyWatcher which made it recognize 'whoAreWe' as a valid study,
  even though the URL didn't allow it.