The original issue didn't specify this, but the code always allowed
reporters to do everything here. I think that's correct because

1. Developer permissions normally refer to code, and boards are to do
   with issues.
2. Reporters can manage epics, as well as labels on
   issues, which are in a similar space.

- Extract 445px as a variable
- Documentation changes: new image and update copy

Markdown renderers find it easier to determine
where lists start and end when lists are surrounded
by new lines.

For consistency, also ensure entries in the list
are aligned when they span multipls lines.