[#79323986] Integration test for removing user
Add the ability to remove participation
Add policy spec changes
Add #destroy tests for participations controller
Attempt to fix intermittent broken capybara spec
Merge branch 'master' into remove-participant
remove unncessary @mention capybara specs since they are being tested at unit level
Merge pull request #481 from Tahi-project/remove-participant

Remove participant
[#79046972] Update author card styling
Large click areas for edit overlay
[#79384948][WIP] Migration to remove AuthorGroup
[WIP] Fix Author update
Make a special subscription for authors.

Serialize down the array of the paper's authors when one changes.
Use the "all" array to populate authors.

Don't use the paper's hasMany association for now since it's not
reliable.
[#79384948] Throw an exception if migration is reverted
[#79384948] Remove author group template
Fix Author View hover class toggle
Fix JSON response from Author Controller
[WIP]
Drag 'n' drop