Update record.phtml

This small change makes a significant improvement in the visibility of the error report functionality. Not sure about the house style consistency of having a btn-medium though.
Cosmetic changes to comment features

Improved look and clarity:
- removed comment button (next to the error button)
- changed comment heading to <h3> from <h4>
- tweaked the comment section to put the number of comments above the comments themselves
- made changes to the text to make it more explanatory and friendly
Made button size and language consistent
Merge pull request #11 from findsorguk/error-report-button

Improve error report button visibility