Add importer role that can be associated with higher rate limits
Remove <picture>s around <img srcset=...>
Fix confirmation prompt when granting or revoking roles
Update rubocop todo and fix new warnings
Fix HTML escaping issues with user role icons
Split some extremely long strings over multiple lines using squiggly heredocs I'm not entirely convinced that testing walls of text like this is useful anyway, but at least this approach makes the lines significantly less long.
Fix rubocop warnings
Convert @user to current_user in helpers
Use user factory for user_roles_helper test
Add srcset to img tags inside picture elements Some browsers (in particular Safari on iOS) don't support picture yet but do support srcset on the img tag.
Use picture elements to render some more graphics as SVG
Fix rubocop warnings
Improve test coverage