10.5 EE Create the "Update" guides

See merge request gitlab-org/gitlab-ee!4445

Memoize MergeRequest#rebase_in_progress? to prevent N+1 queries in Gitaly

Closes #4857

See merge request gitlab-org/gitlab-ee!4439

CE upstream - 2018-02-07 20:29 UTC

Closes #4813, gitaly#880, gitaly#1000, and gitaly#994

See merge request gitlab-org/gitlab-ee!4434

Added changed state to IDE

Closes #4540

See merge request gitlab-org/gitlab-ee!4429

MergeRequest#rebase_in_progress? and MergeRequest#rebase_path were called
twice each time per request. This memoization helps reduce the overall number
of queries.

See https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/51616319 as a failing
job.

Closes gitlab-org/gitlab-ee#4857

Add SSO and CAPTCHA notes to JIRA docs

See merge request gitlab-org/gitlab-ee!4332

added more specs

Annotate graph page for internationalization

See merge request gitlab-org/gitlab-ee!4438

Resolve "Warning about un-replicated data in DR failover"

See merge request gitlab-org/gitlab-ee!4343

Support metrics where smaller is better

Closes #4367

See merge request gitlab-org/gitlab-ee!3891

Move code to EE model to avoid conflicts on pending performance MR

See merge request gitlab-org/gitlab-ee!4423

Resolving conflict with spec/javascripts/filtered_search/components/recent_searches_dropdown_content_spec.js