Retries in Sidekiq and in the remote mirror scheduler can cause repeated
attempts in quick succession if the sync fails. Each failure will then
send an e-mail to all project maintainers, which can spam users
unnecessarily.

Modify the logic to send one notification the first time the mirror
fails by setting `error_notification_sent` to `true` and reset the
flag after a successful sync.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56222

CE port: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24381

Geo: Don't show external link icon for current node

See merge request gitlab-org/gitlab-ee!9130

Make parseBoolean idempotent

See merge request gitlab-org/gitlab-ce!24365

Uses `project_id` for filtering on the GSD

See merge request gitlab-org/gitlab-ee!9109

Fix broken master due to locale/gitlab.pot

See merge request gitlab-org/gitlab-ee!9160

Example: https://gitlab.com/gitlab-org/gitlab-ee/pipelines/43330494

Clarify cluster integration link is for all Kubernetes

See merge request gitlab-org/gitlab-ce!24364

EE: Clarify cluster integration link is for all Kubernetes

See merge request gitlab-org/gitlab-ee!9159

Refactor the Packages documentation

See merge request gitlab-org/gitlab-ee!9095

Generate searchable JSDoc documentation

See merge request gitlab-org/gitlab-ce!23583

Externalize strings from `/app/views/projects/project_members`

See merge request gitlab-org/gitlab-ce!23227

Externalize strings from `/app/views/projects/project_members`

See merge request gitlab-org/gitlab-ee!8727

Not just GKE

Remove all `$theme-gray-{weight}` variables in favor of `$gray-{weight}`

Closes #56266

See merge request gitlab-org/gitlab-ce!24333

Remove all `$theme-gray-{weight}` variables in favor of `$gray-{weight}`

See merge request gitlab-org/gitlab-ee!9133

Fix broken master due to locale/gitlab.pot changes

Closes #9194

See merge request gitlab-org/gitlab-ee!9158

Moves shared code into a mixin

See merge request gitlab-org/gitlab-ce!24322

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

Add Import/Export dev docs

Closes #36055

See merge request gitlab-org/gitlab-ce!23835

GitLab 11.4.3 "Outbound requests" setting path

See merge request gitlab-org/gitlab-ce!22898

Not just GKE

Fix no avatar not showing in user selection box

Closes #56268

See merge request gitlab-org/gitlab-ce!24346

Add 11.7 -> 11.8 update doc

See merge request gitlab-org/gitlab-ce!24283