Add print styles to improve smart answers printouts

• Remove any unwanted page elements (breadcrumb, change links etc)
• Remove link underlines for better clairty
• Limit page title width for better line length
• Remove margin for prev answers table and add cell padding
• Adjust prev answers table column widths for better readability
• Fix inconsistent alignment of '!' for help/info notices

https://www.agileplannerapp.com/boards/105200/cards/6344
Totally agree, have made a pull request to the styleguide to that effect: https://github.com/alphagov/styleguides/pull/51