message: Uniform sizing
diff: .OnboardingGuide__actions
  if authentication && authentication.id
  - button.Button.Button--size-lg( disabled )
  + button.Button( disabled )
  | Connected to Twitter
  else
  - button.Button.Button--size-lg.js-connect-twitter
  + button.Button.js-connect-twitter
  | Find Twitter friends
  - button.Button.Button--secondary.js-next
  + button.Button.js-next(
  + class=(authentication && authentication.id ? '' : 'Button--secondary')
  + )
  | Start using Are.na
  .OnboardingGuide__pane
  