EE fixes for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/17796

# Conflicts:
#	doc/README.md

[ci skip]

Bump `state_machines-activerecord` to `0.5.1`

See merge request gitlab-org/gitlab-ce!17924

[CE] ProtectedBranch API omits empty declared params

See merge request gitlab-org/gitlab-ce!17993

Docs organize main page by product category

See merge request gitlab-org/gitlab-ee!5052

Docs organize main page by product category

See merge request gitlab-org/gitlab-ce!17429

CE upstream - 2018-03-26 09:28 UTC

See merge request gitlab-org/gitlab-ee!5111

Move the rest EE files from app and lib

See merge request gitlab-org/gitlab-ee!5057

Array.fill polyfill for IE 11 compatibility.

Closes #44103

See merge request gitlab-org/gitlab-ce!17897

Merge branch '5409-geo-recovery-from-geo-temporary-directory-doesn-t-work-if-the-namespace-directory-doesn-t-exist' into 'master'

Resolve "Geo: Recovery from @geo-temporary directory doesn't work if the namespace directory doesn't exist"

Closes #5409

See merge request gitlab-org/gitlab-ee!5100

Disable cursor for review mode in the IDE

Closes #44307

See merge request gitlab-org/gitlab-ce!17955

Merge branch '43316-controller-parameters-handling-sensitive-information-should-use-a-more-specific-name' into 'master'

Resolve "Controller parameters handling sensitive information should use a more specific name"

Closes #43316

See merge request gitlab-org/gitlab-ce!17796

Define a chat responder for the Slack app

Closes #5383

See merge request gitlab-org/gitlab-ee!5077

add SHA1 fingerprint requirement

See merge request gitlab-org/gitlab-ce!17976

Remove N+1 query for Noteable association.

Closes #43150

See merge request gitlab-org/gitlab-ce!17956

Resolve "Forking with namespace doesn't work (API)"

Closes #40798

See merge request gitlab-org/gitlab-ce!17815

Resolve "Update grape to v1.0.2 when it is released"

Closes #40843

See merge request gitlab-org/gitlab-ce!17983

Add missing changelog entries for 10.6.0

See merge request gitlab-org/gitlab-ce!17973

[ci skip]

Allow enabling External Policy Control without URL

Closes #4786

See merge request gitlab-org/gitlab-ee!5083

Make use of the prettier ignore file during our save script

Closes #44581

See merge request gitlab-org/gitlab-ce!17960

CE upstream - 2018-03-26 00:25 UTC

See merge request gitlab-org/gitlab-ee!5109

# Conflicts:
#	config/webpack.config.js

[ci skip]

CE upstream - 2018-03-23 18:25 UTC

Closes gitaly#1101, #4683, and gitlab-com/infrastructure#19

See merge request gitlab-org/gitlab-ee!5102

Fix a test that is going to break, that has not broken yet

See merge request gitlab-org/gitlab-ce!17966