User admin approval - Email user when approved

See merge request gitlab-org/gitlab!45947

Add test history to test report MR widget

See merge request gitlab-org/gitlab!45953

Add feature attribute to known_events.yml

See merge request gitlab-org/gitlab!46853

  - Add feature attribute, corelate specific event
    with the corresponding feature flag.
  - Add docs

Email user when request to join instance approved

When a user's request to access an instance is approved they should
receive an email letting them know.

Committing for save

Update email conditionals

Committing for save

Committing for save

Rebased with master

Get notify mailer working

Delete unused files

Remove extra space

Update email text

Change notify back to devise mailer

Verify that email is working

Use letter opener to verify that email is sent and formatted correctly,
fix spec and static analysis errors

Remove unused functions

Re add removed test

Run bin rake gettext regen

Add negative test case

Add changelog entry

Remove username helper

Didn't need username helper, just used string interp

No plain strings

Use different string interp

Remove extra newlines

Add translation strings

Add equals sign

Address MR review comments

Clarify tests, DRY tests, add tests

Clarify email spec

Clarify deliver email to user email

Add missing space

Add html safe link

Clean up spec

Correct html safe link

Regex match link

Move link to email view

Move link out of email helper and into email view, which makes writing
specs way easier

Use percent interpolation instead of hash

Re run gettext regenerate

Change html haml email link

Rerun gettext regenerate

Match variable name

Rebase with master for merge conflict

Merge conflict resolution

Change resource to user

Fix static analysis errors

Change user back to resource

Include aggregated git-write usage counts

See merge request gitlab-org/gitlab!47511

With s__('Reports|...')

Full sentences approach for summary text i18n
Add spec to check that feature flag is pushed
Shorten a few names

Push the feature flag to the frontend in the merge requests controller
Only display the recent failures summaries and badges if enabled
Adjust spec to check for presence/absence when enabled/disabled

Add a mock report with recent_failures
Add tests for recent failure counts and text

Count recent failures when reports are loaded
Store counts in report summaries
Display counts in the widget

Add `approved` as action type on events API

See merge request gitlab-org/gitlab!47273

Move style guide into subdir for future splitting

See merge request gitlab-org/gitlab!47237

In prep for splitting the style guide apart, move the file to its
own folder.

Remove snippets from rubocop manual rules

See merge request gitlab-org/gitlab!47549

Fix kwargs deprecation warnings in git diff specs

See merge request gitlab-org/gitlab!47541

Replace prometheus service with a more general policy

See merge request gitlab-org/gitlab!47434

Document the pitfalls of GraphQL uploads

See merge request gitlab-org/gitlab!47494

Support variables in rules:changes

See merge request gitlab-org/gitlab!45037

Add assignee search to group issue board sidebar

See merge request gitlab-org/gitlab!47241

Remove gl-button class in fork button

See merge request gitlab-org/gitlab!46616

Merge branch '273423-implement-vulnerability-counts-in-security-mr-widget-for-non-ultimate-users-secret-detection-vuex' into 'master'

Extract and move Secret Detection Vuex module to CE

See merge request gitlab-org/gitlab!47307

Swimlanes - Fix grabbing cursor on drag

See merge request gitlab-org/gitlab!46938

Pipeline GraphQL Conversion Part I

See merge request gitlab-org/gitlab!46380

Expose discussion and notes count in Epic query

See merge request gitlab-org/gitlab!47409

Update chevron-down icon on project branch page

See merge request gitlab-org/gitlab!47460

Add more info about KAS for Omnibus GitLab

See merge request gitlab-org/gitlab!46948

This commit fixes warnings like:

Passing the keyword argument as the last hash parameter is deprecated

Fix pipelines chart query timeout

See merge request gitlab-org/gitlab!47069

Chain of custody report filter by merge commit sha

See merge request gitlab-org/gitlab!46581

Diff file view optimisations

See merge request gitlab-org/gitlab!47091

We can modify the original string here as this is only a
view helper.

Add DevopsAdoptionTableCellFlag component

See merge request gitlab-org/gitlab!47376

This component is needed in order to display
the adoption status of an item, i.e.
true or false

Doc updates for HTTP endpoints

See merge request gitlab-org/gitlab!47354