Review follow up

- Fix doc comment indentation
- Move catch(){} onto same line as closing try brace
- Convert tabs to spaces in confirmation.js
- Correct css indentation
- Change tense of doc comment
- Use null instead of {} for empty template context
- Add title to home link
- Scope confirmation widget CSS
- Document most recent ticket in sessionStorage
- Use oae.api.util.redirect instead of assigning window.location
- Remove unnecessary newlines in tickets api