[#79323986] Integration test for removing user
Add the ability to remove participation
resize column headers when clicking Cancel on phase

[#80255838]
Merge branch 'master' into fix-phase-header-positioning
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
Remove `url` key from Sidekiq configuration

This way, Sidekiq uses its own conventions to work it out.
Merge pull request #482 from Tahi-project/support-multiple-sidekiqs

Remove `url` key from Sidekiq configuration
Merge pull request #479 from Tahi-project/fix-phase-header-positioning

resize column headers on click of 'Cancel' on phase
Show sub navigation on Paper Show screen
[#80393480] Style the change password screen
[WIP]
WIP
WIP
WIP