Include fact check request recipients in note

Fixes https://www.agileplannerapp.com/boards/173808/cards/8677

Previous refactor led to a regression where if a user provided a comment along with a fact check request the email addresses of that request wouldn't be displayed.

* Show both comment and email addresses
* Include test to document behaviour
* Format mailto address to remove spaces, a mailto which contains spaces is an invalid link

Thanks @vinayvinay