Fix bug where Geo secondary Sidekiq cron jobs would not be activated if settings changed

Closes #2289

See merge request !1754

Change from .click -> .trigger('click') to make spec pass

See merge request !1760

CE upstream: Thursday

Closes #2246

See merge request !1749

If a secondary starts up before it has been made a secondary, the Sidekiq initializer
would disable the backfill and file transfer cron jobs. This state persists indefinitely
until either the entire Redis database is flushed or the jobs are manually activated.
To fix this, we activate the jobs at startup if Geo is being used.

Closes #2289

Make the elasticsearch service use less RAM

See merge request !1747

Add global wiki search using Elasticsearch

Closes #1565

See merge request !1717

Skip irrelevant jobs for documentation only changes

See merge request !1742

Fix commit search on some elasticsearch indexes

Closes #2280

See merge request !1745

Port of 2246-uuid-is-nil-for-new-installation to EE

See merge request !1733

Fix MR approvals sentence

Closes #2272

See merge request !1730

# Conflicts:
#   db/schema.rb

Fix creating issues by email with Service Desk on

Closes gitlab-ce#31434

See merge request !1743

Port of environments-vue-5 to EE

See merge request !1722

Refactor rich blob viewers and add Source|Rendered switch

See merge request !1720

CE upstream - Wednesday

Closes gitaly#182, gitlab-ce#31276, #1440, and gitlab-ce#22740

See merge request !1725

gitter badge in the readme pointing to gitlabhq/gitlabhq

See merge request !10968