Add assignee lists to boards

Closes #5784

See merge request gitlab-org/gitlab-ee!5743

Fix card class for integration forms

Closes gitlab-ce#47074

See merge request gitlab-org/gitlab-ee!5983

Port of '38542-application-control-panel-in-settings-page' to EE

See merge request gitlab-org/gitlab-ee!6045

EE: Resolve "Timeout searching group issues"

See merge request gitlab-org/gitlab-ee!6028

Resolve "Admin area > Appearance forms"

Closes #6213

See merge request gitlab-org/gitlab-ee!6042

Resolve "Geo: Automatically clean up stale lock files on Geo secondary"

Closes #5533

See merge request gitlab-org/gitlab-ee!6034

Use variables for authenticated example

See merge request gitlab-org/gitlab-ee!6038

Apply CE feature to EE: Resolve "Show `failure_reason` and improve failed jobs tab in pipeline detail view"

See merge request gitlab-org/gitlab-ee!6043

Apply CE feature to EE: Resolve "Show `failure_reason` and improve failed jobs tab in pipeline detail view"

Add approval widget support for zero approvals.

See merge request gitlab-org/gitlab-ee!6032

Add presets for navigating Epic Roadmap

Closes #4936

See merge request gitlab-org/gitlab-ee!5798

[EE] Customizable favicon

See merge request gitlab-org/gitlab-ee!5999