Remove N+1 queries for Groups::AnalyticsController

Closes gitlab-ce#22940 and #1886

See merge request !1514

Closes gitlab-org/gitlab-ce#22940, #1886

Allow downgrade when no users were added in previous period

See merge request !1490

Currently a customer can't downgrade because validations will fail given
the historical max will be greater than the current active users. If
customer hasn't added more users in the previous period we should
compare against the current active users instead.

Change full colors to a more harmonious palette

See merge request !1504

Show loading icon when changing filter in add issues modal EE port

See merge request !1505

# Conflicts:
#	app/assets/stylesheets/framework/variables.scss

Closes #29615

Fix dead docs link

See merge request !1492

Lightly refactor js files related to file template selectors.

See merge request !1496

Fixes issue not adding with milestone on board with associated milestone

Closes #1934 and gitlab-ce#29612

See merge request !1445

CE upstream: Thursday

See merge request !1497

Remove unnecessary span in approvals footer

See merge request !1499

Port of 'remove-cookies-global' to EE

See merge request !1411

Remove Cookies class from global space

See merge request !9883

Fixed the filter bar not working in IE

Closes #29742

See merge request !10149

CE Upstream - Wednesday

Closes gitaly#136

See merge request !1489

Allow chat notifications only for the default branch

Closes #28565 and #18088

See merge request !10158

Increase ETag cache expiry time

See merge request !10180

Display all closed issues in “done” board list

Closes #24215

See merge request !10173

Limit generated project push rule routes to one route that is really used

See merge request !1487

Don't try to find a user by personal_access_token if the token is nil

See merge request !10146

align Mark all as done with other Done buttons on Todos page

Closes #29555

See merge request !10171

Introduce a new middleware for the test environment that can block requests

Closes #28307

See merge request !9846

Run bundle install after checking out $CI_COMMIT_SHA

See merge request !10166

Use match_array instead of eq when order is irrelevant

Closes #29709

See merge request !10148

Fixed bug stopping issue boards cards being dragged

Closes #29576

See merge request !10139

Poll with vue resource get function

Closes #29575

See merge request !10057

Correct parameter definition in Pipeline Triggers docs

See merge request !10176

As discussed in #29777.

Add notes about dropping support for Ruby 2.1.x

See merge request !10170

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