Resolve "Tree control buttons misbehave on small viewports"

Closes #37680

See merge request gitlab-org/gitlab!20952

Changes the rendering of tree-controls elements from flex to inline
Removes the whitespaces between them

Add limit to snippet content size

See merge request gitlab-org/gitlab!20346

Productivity Analytics: Allow user to clear chart data

Closes #36019

See merge request gitlab-org/gitlab!20630

- Adds a button next to the main chart
which enables users to clear selected items
on the main chart

Snowplow: Track adding new metric

See merge request gitlab-org/gitlab!20818

Merge branch '36454-allow-migration-helpers-to-create-a-new-foreign-key-for-an-existing-column-but-with-a' into 'master'

Resolve "Allow migration helpers to create a new foreign key for an existing column, but with a different name"

Closes #36454

See merge request gitlab-org/gitlab!20212

Update Capybara to the latest version

See merge request gitlab-org/gitlab!18927

One of the improvements available in this version is better handling
of unexpected alerts, which might help solve a problem we're facing

See https://gitlab.com/gitlab-org/gitlab/issues/34551
And https://github.com/teamcapybara/capybara/pull/2150

Also updates capybara-screenshot too because the previous version
wouldn't work with capybara 3.

Make issuable suggesstions specs compatible w/ BootstrapVue 2

See merge request gitlab-org/gitlab!20990

Add parent argument to Bulk Update Service

Closes #12687

See merge request gitlab-org/gitlab!20259

New metrics can be added via the monitoring
dashboard. This MR tracks such user actions

Make diff specs compatible w/ BootstrapVue 2

See merge request gitlab-org/gitlab!20989

Remove feature flag for limiting diverging commit counts

See merge request gitlab-org/gitlab!20999

Update README.md, improving sort of environment variables by lexicographical order.

See merge request gitlab-org/gitlab!21002

Add unitless example for start_in

See merge request gitlab-org/gitlab!20895

Revert "Merge branch 'marginalia' into 'master'"

Closes #37897

See merge request gitlab-org/gitlab!21015

This reverts merge request !19759

Restyled Markdown to match GitLab style guide

See merge request gitlab-org/gitlab!20013

Update markdown.md with missing  audio file extensions.

See merge request gitlab-org/gitlab!18471

In GitLab 12.4 via
https://gitlab.com/gitlab-org/gitlab/merge_requests/16737, we required
the frontend to request at most 20 branches in the
`Projects::BranchesController#diverging_commit_counts` endpoint to avoid
Gitaly N+1 issues. This commit removes the feature flag and makes this
behavior mandatory. In the past week, there do not appear to be any
rejections, which would show up as 422 errors.

Programmatically document column ignores

See merge request gitlab-org/gitlab!19963

Makes the security dashboard empty state a scoped slot

See merge request gitlab-org/gitlab!18382

- Defaults to a generic empty state message.
- Set explicit messages for:
- - Group Dashboard
- - Project Dashboard
- - Pipeline Dashboard

Limit the merge request target branch autocompletion action to group or project scope

See merge request gitlab-org/gitlab!20933

Improve .groups_user_can_read_epics performance

See merge request gitlab-org/gitlab!20833

Refactor environment table titles and spacing

See merge request gitlab-org/gitlab!20769

Add dependency scanning flag

See merge request gitlab-org/gitlab!20743

Resolve "Docs feedback: Need to document required permissions"

Closes #35933

See merge request gitlab-org/gitlab!20861

Allow intra-project MR dependencies

Closes #34735

See merge request gitlab-org/gitlab!20858