Add a Go back option to Web IDE

Closes #4592

See merge request gitlab-org/gitlab-ee!4969

Choose shortest match for CE branch in ee-files-location-check.

Closes #5271

See merge request gitlab-org/gitlab-ee!4968

Bump fog-google to 1.3.3

Closes #5249

See merge request gitlab-org/gitlab-ee!4999

IDE open changed files in diff viewer

Closes #4568

See merge request gitlab-org/gitlab-ee!4789

Docs: refactor doc general guidelines and style guidelines

See merge request gitlab-org/gitlab-ee!4750

Resolve "Geo docs: Second SSH restart only considers ‘ssh’ not ‘sshd’"

Closes #5263

See merge request gitlab-org/gitlab-ee!4990

Update Code Quality example documentation

See merge request gitlab-org/gitlab-ee!4991

CE upstream - 2018-03-16 12:24 UTC

See merge request gitlab-org/gitlab-ee!4998

Resolve "Isolate elasticsearch-using specs"

Closes #4986

See merge request gitlab-org/gitlab-ee!4983

Cache column_exists? for Elasticsearch columns

Closes gitlab-ce#43355

See merge request gitlab-org/gitlab-ee!4987

# Conflicts:
#	doc/ci/examples/README.md
#	doc/ci/examples/sast_docker.md
#	doc/topics/autodevops/index.md

[ci skip]

changed selection background color

added pointer cursor to diff overview

hide viewport display

fix content not resetting when discarded

added comment re. try/catch in dispose

hide diff overview in diff editor

update dropdown icon
make clearing the editor more performant

Closes #4568

Closes #5271.

Fixes merge request bar styling when performance bar is visible

See merge request gitlab-org/gitlab-ce!17778

CE upstream - 2018-03-16 09:25 UTC

See merge request gitlab-org/gitlab-ee!4996