- Personal projects are those which are directly attached to the user's
   personal namespace
- Create a presenter to house a lot of the logic, attributes, & text
- Use the `Users::Callout` model to record that the banner has been
   dismissed by the user and don't show it to them again
- Use the mechanisms supplied by `persistent_user_callouts.js` to
   connect the dismiss button to the `/-/user_callouts/` endpoint
- Add specs for the new presenter & feature specs to exercise the full
   behavior