Prominent text on defunct roles
and refactor information block

• add status block at top of roles page with no minister assigned
• update information-block to status-block
• make status-block modular
• refactor current instances of these
• general code tidy along the way

https://www.pivotaltracker.com/story/show/58423494
add newline at end of file
Merge pull request #932 from alphagov/promenent-text-on-defunct-roles-informationblock-refactor

Prominent text on defunct roles

https://www.pivotaltracker.com/story/show/58423494