add overview and use-cases for repo mirroring - replaces https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/627

Add a EE::LicenseHelpers to easily enable/disable features

Closes #2657

See merge request !2220

Add documentation for GitLab ruby monitoring

See merge request !2222

Clarify terminology that authorized_keys box should be unchecked for Geo

See merge request !2226

Resolve "Related Issues BE followup - Add public API"

Closes #2633

See merge request !2123

fix typos & add links in Push Rules docu [skip ci]

See merge request !757

Fixes missing overflow on the right sidebar

See merge request !2224

Without this a horizontal scrollbar appears

[ci skip]

Resolve "Can't sort Groups"

See merge request !2156

CE upstream

Closes gitlab-ce#33877, gitlab-ce#33594, gitlab-ce#33598, and gitlab-ce#27070

See merge request !2178

Remove left margin for stages with downstream and only one job

Closes #2714

See merge request !2221

Geo: fix removal of repositories from disk on secondary nodes

Closes #2701

See merge request !2210

Fix linking to line number on parallel diff creating empty discussion -- EE merge edition

Closes gitlab-ce#34010

See merge request !2207