Partially addresses #47006.

Resolve "Introduce hover, active, focus states for files in sidebar of Web IDE"

Closes #46202

See merge request gitlab-org/gitlab-ce!19969

Unify some projects controllers

See merge request gitlab-org/gitlab-ce!20157

Moves some issue boards components into `.vue` file

See merge request gitlab-org/gitlab-ce!20106

Bumps gitlab-svg library version

See merge request gitlab-org/gitlab-ce!20153

Change button text to more specific "Discard draft"

Closes #47475

See merge request gitlab-org/gitlab-ce!20140

[master] HTML escape branch name in project graphs page

See merge request gitlab/gitlabhq!2408

[master] Don't show internal info in public feed

See merge request gitlab/gitlabhq!2395

[master] HTML escape the name of the user in ProjectsHelper#link_to_member

See merge request gitlab/gitlabhq!2401

[master] Fix xss for Markdown elements where [[_TOC_]] is enabled

See merge request gitlab/gitlabhq!2400

[master] Update sanitize gem to 4.6.5 to fix HTML injection vulnerability

See merge request gitlab/gitlabhq!2399

Resolve "Guide users towards editing capabilities in review mode of Web IDE"

Closes #45933

See merge request gitlab-org/gitlab-ce!20008

Don't try to load omniauth if not enabled

Closes gitlab-ee#6591

See merge request gitlab-org/gitlab-ce!20132

Moves remove_issue component into a .vue file

See merge request gitlab-org/gitlab-ce!20067

Honor saml assurance level to allow 2FA bypassing

See merge request gitlab-org/gitlab-ce!19651

Moves CreateFromBundle RPC to mandatory

Closes gitaly#944

See merge request gitlab-org/gitlab-ce!20144

Unify some admin controllers

See merge request gitlab-org/gitlab-ce!20147

Ancestor check is Gitaly only now

Closes gitaly#789 and gitaly#308

See merge request gitlab-org/gitlab-ce!20095

Write Config is mandatory

Closes gitaly#879

See merge request gitlab-org/gitlab-ce!20146

Prefer `expect_next_instance_of` over `expect_any_instance_of`

See merge request gitlab-org/gitlab-ce!20141

Remove Languages feature gate

See merge request gitlab-org/gitlab-ce!20128

Gitaly tree entry is mandatory

Closes gitaly#310

See merge request gitlab-org/gitlab-ce!20099

Notify conflict only for opened/locked merge requests

See merge request gitlab-org/gitlab-ce!20125

Make GFM Autocomplete configurable

See merge request gitlab-org/gitlab-ce!20066

Document how the new automatic review apps for docs work

See merge request gitlab-org/gitlab-ce!20149

Update project sidebar to work with EE feature Security Dashboard

See merge request gitlab-org/gitlab-ce!20101

Resolve "WebHookService doesn't handle user info with nil passwords"

Closes #46571

See merge request gitlab-org/gitlab-ce!19945

This was missed from
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20130

Fixed the IDE commit list item loosing its active state

Closes #48125

See merge request gitlab-org/gitlab-ce!20138

This specific one isn't used on most machines, therefor low risk.

Closes https://gitlab.com/gitlab-org/gitaly/issues/944