Improve board_with_milestone_spec

Closes #1960

See merge request !1840

Correctly stub application settings in signup_spec.rb

See merge request !11151

Fix fork_spec failure to do with mySQL

Closes #31870

See merge request !11121

Merge branch '2334-can-t-activate-approvals-the-form-contains-the-following-error-approver-groups-is-invalid' into 'master'

Resolve "Can't activate approvals: The form contains the following error: Approver groups is invalid"

Closes #2334

See merge request !1831

Resolve "Can't activate approvals: The form contains the following error: Approver groups is invalid"

issue-title-description realtime

See merge request !1834

Merge branch 'ee-29925-gitlab-shell-hooks-can-no-longer-send-absolute-paths-to-gitlab-ce' into 'master'

29925 gitlab shell hooks can no longer send absolute paths to gitlab ce

See merge request !1832

Port of 12910-personal-snippets-notes

See merge request !1830

Check if license exists before checking the addon.

Closes #2355

See merge request !1829

Store the last time a repository was updated

See merge request !1788

Disable mirror workers for Geo secondaries

See merge request !1671

# Conflicts:
#	app/views/snippets/show.html.haml
#	spec/helpers/notes_helper_spec.rb

CE upstream: Thursday

Closes #2251 and gitaly#157

See merge request !1818

This new param allows us to share project information between components
that don't share or don't have access to the same filesystem
mountpoints, for example between Gitaly and Rails or between Rails and
Gitlab-Shell hooks. The previous parameters are still supported, but if
found, gl_repository is prefered. The old parameters should be deprecated
once all components support the new format.

Fix email receiver metrics events

See merge request !1828

Remove superfluous wording on push rules

See merge request !1811

`Project#inspect` isn't very useful for examining usage of these features.

EE port of "Display slash commands outcome when previewing Markdown"

See merge request !1707

Order rejected paths like in EE

See merge request !1821

Create new branch from issue page

See merge request !1808