Freeze strings in email service specs

See merge request gitlab-org/gitlab-ce!26485

Extract EE specific files/lines for Release app/serializers

See merge request gitlab-org/gitlab-ce!26087

Bump pg gem from 1.1.3 to 1.1.4

See merge request gitlab-org/gitlab-ce!26471

Revert "Merge branch 'winh-remove-sushi' into 'master'"

See merge request gitlab-org/gitlab-ce!26470

This keeps the version used by gitlab-monitor and GitLab CE
consistent. This release also adds Ruby 2.6 support and PostgreSQL 11
error codes:

https://github.com/ged/ruby-pg/blob/master/History.rdoc

[CE] Extract EE specific files/lines from spec/finders

Closes gitlab-ee#10142 and gitlab-ee#10141

See merge request gitlab-org/gitlab-ce!26337

This reverts merge request !26430

Add end-of-string to regex example

Closes #58031

See merge request gitlab-org/gitlab-ce!26302

Docs cleanup fe

See merge request gitlab-org/gitlab-ce!26158

Add highest_role method to User

See merge request gitlab-org/gitlab-ce!25462

Implemented trimming for item's name in Web IDE

Closes #57540

See merge request gitlab-org/gitlab-ce!26270

Mock and wait for timers in Jest

Closes #56056

See merge request gitlab-org/gitlab-ce!26433

Automate base domain help text on Clusters page

Closes #57357

See merge request gitlab-org/gitlab-ce!26124

Display draft when toggling replies

Closes #48211 and #56364

See merge request gitlab-org/gitlab-ce!25563

Display the database adapter name in a human-friendly way

See merge request gitlab-org/gitlab-ce!26437

Improve Youtrack documentation for style

See merge request gitlab-org/gitlab-ce!26457

YouTrack docs review

Closes #58225

See merge request gitlab-org/gitlab-ce!26454

Clarify wiki permissions

Closes #53964

See merge request gitlab-org/gitlab-ce!23044

Start moving back to regular fe_docs
Remove Initiatives, add section to index in fe_guide
Delete some no-longer-relevant parts from principles
Update title - Progressive Enchancement is a browser-support term
and could be confused
"When to use" parts are discussed elswhere
Vue & jQuery issue is no longer relevant
Delete duplicate Security docs
Remove empty files, move event_tracking
Shuffle index sections around
Remove sections on Vue & Webpack (we say same thing in prev paragraph)
Remove link to Droplab docs

Fix markdown table header and table content borders

Closes #57655

See merge request gitlab-org/gitlab-ce!25666

Rollback change that adds :not(js-syntax-highlight) pseudo-class
to markdown selectors to fix syntax highlight tables in
MR code suggestions. Removes redundant inclusion of
md-typography mixin as an alternative fix.

Resolve "Kubernetes > Create cluster > Add help text to environment field"

Closes #56944

See merge request gitlab-org/gitlab-ce!25891

Resolve "Buttons on group page are misaligned"

Closes #57894

See merge request gitlab-org/gitlab-ce!26292

Remove .raw from JavaScript fixture file names

Closes #59201

See merge request gitlab-org/gitlab-ce!26430

[ci skip]

Docs: Rewrite Work In Progress MR page

Closes #34559

See merge request gitlab-org/gitlab-ce!25732