Fix up tech debt comments from @jschatz1

 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10837#note_28757436
 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10837#note_28757905
 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10837#note_28757952
 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10837#note_28758013

Clean up diff rendering

See merge request !11390

Resolve "GitLab 9.0 to 9.2 is incompatible with PostgreSQL 9.1"

See merge request !11709

Add small update for the i18n guide.

See merge request !11719

Prevent commits from upstream repositories to be re-processed by forks

Closes #19262

See merge request !11511

Provide default for calculating label text color

Closes #32728

See merge request !11681

Bugfix: Always use the default language when generating emails.

Closes #32748

See merge request !11662

Recompile test env Gitaly when `GITALY_SERVER_VERSION` fails

Closes #32762

See merge request !11664

Fix note header author and time ago wrapping in parallel diff

Closes #32801

See merge request !11702

Autolink package names in more dependency files

See merge request !11226

Fix filtered search issuable empty state exception

Closes #31455

See merge request !11347

Remove 0 margin bottom for last paragraph on note text

See merge request !11699

There was a race condition issue when the application was generating an
email and was using a language that was previously being used in other
request.

Refactor `DynamicPathValidator` and `GitLab::Regex` some more

See merge request !11693

Fix terminals support for Kubernetes service

Closes #31754

See merge request !11653

Use grpc 1.3.4

See merge request !11645

Implement Web Hooks calls logging

Closes #17848

See merge request !11027

It was broken, because we introduced a default namespace, which was not used by terminal methods.

Use smaller image when triggering a build

See merge request !11674

Fix transient error clicking dropdown items in compare_spec.rb

See merge request !11582

Add notes to the kubernetes install docs regarding source IPs

Closes #32890

See merge request !11697

Add docs on milestone percentage stats

See merge request !11428

Fix alignment of hover state on emoji button

Closes #32850

See merge request !11691

Use briefcase icon for company

Closes #32807

See merge request !11692

Use non-global jQuery reference within raven bundle

Closes #32662

See merge request !11581

* implemented logging of project and system web hooks
* implemented UI for user area (project hooks)
* implemented UI for admin area (system hooks)
* implemented retry of logged webhook
* NOT imeplemented log remover

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/32801