* master: (86 commits)
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33874 confidential issue redesign
Exclude merge_jid on Import/Export attribute configuration
Resolve "User dropdown in filtered search does not load avatar on `master`"
Re-add column locked_at on migration rollback
Group-level new issue & MR using previously selected project
[EE Backport] Update log audit event in omniauth_callbacks_controller.rb
more eagerly bail when the state is prevented
Move locked_at removal to post-deployment migration
Add class to other sidebars
Improve mobile sidebar
reduce iterations by keeping a count of remaining enablers
Store & use ConvDev percentages returned by Version app
Store MergeWorker JID on merge request, and clean up stuck merges
Backport changes in https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2551 to CE
DRY up caching in AbstractReferenceFilter
Update CHANGELOG
Add CHANGELOG entry
Fix html structure Removes test for removed behavior
Port form back to use form_tag
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