Change 'See This Page' to 'Preview'.  [#55994072]

https://www.pivotaltracker.com/story/show/55994072
Fix spelling problem: [#56010414]

When image question not answered, activity page summary shows "Not Ansered" instead of "Not Answered"
This was interacting badly with changes to spec_helper (visit ! defined)

Capybara adds DSL to support things like "visit" but not to spec/views

This before filter ran even though this was a pending test:
https://github.com/concord-consortium/lara/blame/master/spec/spec_helper.rb#L74-L77

In the context of this test in spec/views 'visit' is not defined.
Tavis CI isn't calling rake db:migrate like I would hope it would...