Merge remote-tracking branch 'origin/master' into 41416-making-instance-wide-data-tools-more-accessible

Resolve "Merge Request API response is missing changes_count"

Closes #47728

See merge request gitlab-org/gitlab-ce!19745

Fix Karma failures due to invalid icon names

See merge request gitlab-org/gitlab-ce!20887

The icon JSON field has been renamed from icon_status_success to status_success.

Resolve "Red master: can't modify frozen String in app/views/projects/jobs/_sidebar.html.haml"

Closes #49681

See merge request gitlab-org/gitlab-ce!20869

[ci skip]

Update gitlab-shell version to 7.2.0

See merge request gitlab-org/gitlab-ce!20876

Put fallback reply-key address first in the References header

See merge request gitlab-org/gitlab-ce!20871

Stop building Route rows on the fly

See merge request gitlab-org/gitlab-ce!20313

The References header is an ordered list of mails, and some clients
only look at the last mail in the list to determine to which mail the
mail is in reply to.

Therefore, to be a less obtrusive as possible, put the fallback
address first.

Some info about the reply key lookup in the References header:
https://docs.gitlab.com/ee/administration/reply_by_email.html#how-it-works

This reverts merge request !20679

Resolve "Making instance-wide data tools more accessible"

Closes #41416 and #48507

See merge request gitlab-org/gitlab-ce!20679

CE: Add PolicyCheckable concern for things passing to policy check

See merge request gitlab-org/gitlab-ce!20839

if all methods are also presented in the user.

It's sad that sanitizing is updating the string directly.