docs: Add navigation to DropLab plugins on Frontend Development Guide

See merge request gitlab-org/gitlab!47752

Add documentation for Instance Statistics feature flag

See merge request gitlab-org/gitlab!47454

Previously an MR added Instance Statistics documentation to describe
the feature flag and a warning about availability. The feature flag
has since been set to default_enable and the feature flag description
in the documentation was removed. This finishes the removal by
removing the warning.

Minor style updates for InputSetter page.

Minor style edits to filter plugin page.

Minor edits for style to Ajax page.

Remove DOMContentLoaded Eventlisteners

See merge request gitlab-org/gitlab!47781

Removed relative link to allow testing to complete.

Add database section for disabling an index

See merge request gitlab-org/gitlab!47456

Update GEO configuration docs to reflect new settings

See merge request gitlab-org/gitlab!47672

* Remove step for enabling hashed storage. This is now the default
* Update protocol settings step.
  * Add mention of subsection where the setting can be found
  * Mention that the default behavior is sufficient

Update the database docs to include instructions on
how to disable an index and use cases.

Fixed links and revised wording

Some line length and style changes.

Merge branch '283919-usage_data_static_site_editor_commits-and-usage_data_static_site_editor_merge_requests' into 'master'

Remove unused feature flags

See merge request gitlab-org/gitlab!47795

Update documentation guidelines

See merge request gitlab-org/gitlab!46902

Image scaling developer docs

See merge request gitlab-org/gitlab!47506

Remove feature flag for HTTP Integration API

See merge request gitlab-org/gitlab!47687

Remove DOMContentLoaded Eventlistener

See merge request gitlab-org/gitlab!47632

Ignore ee directory if ESLint is run with FOSS_ONLY=1

See merge request gitlab-org/gitlab!47453

Removing gitlab_monitor from example config docs

See merge request gitlab-org/gitlab!47579

Note that JupyterHub requires Ingress

See merge request gitlab-org/gitlab!47349

Update button in show.html.haml

See merge request gitlab-org/gitlab!47626

Docs: Add version history note to API template

See merge request gitlab-org/gitlab!47785

Signed-off-by: Rémy Coutable <remy@rymai.me>

User admin approval - Default for new instances

See merge request gitlab-org/gitlab!46937

Rebase with master

Add changelog entry

Change column default from false to true

Add stub require admin approval false

Stub setting before all

Test new context

Not ready for review just saving

Remove extra spaces

Stub application setting in the right place

Add new spec for admin approval true

Add specs for require admin approval true

Not quite ready for review, will rearrange tests

Stub application setting

Change some specs

Reword some spcs

Remove extra new user signups cap

Rerun db migrate

Change settings spec

Use with lock retries

Remove extra new line

Rearrange db structure

Readd deleted migration

Remove with lock retries

Add API get /invitations for project and group

See merge request gitlab-org/gitlab!46046

CSS Select2 Lazy Bundle Changes only

See merge request gitlab-org/gitlab!47611

Fix tests relying on lazy-loaded images

See merge request gitlab-org/gitlab!47600

Fix create_migrations_index for ES6

See merge request gitlab-org/gitlab!47651

Fix Ruby 2.7 kwargs deprecation warning in current_settings

See merge request gitlab-org/gitlab!47762

Removing DOMContentLoaded Eventlisteners from
index files since the scripts
are embedded using the defer tag.

Replaces 3 spinner Icons with new ones

See merge request gitlab-org/gitlab!47765

Update icons to svg for issuable pages

See merge request gitlab-org/gitlab!47596

Docs: Add guidelines on how to mix  classes and Vue

See merge request gitlab-org/gitlab!38470