IssuableFinder#count_by_state called from cached_assigned_issuables_count with a string state was causing incorrect values to be cached.
Improvements to wording and rubocop fixes.

Avoids creating unnecessary arrays in Issuable#labels_hash
Uses cached issues count in CSV export modal

Resolve "Elasticsearch project indexing fails on bad data"

Closes #1840

See merge request !1365

CE upstream

See merge request !1360

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

# Conflicts:
#   app/helpers/preferences_helper.rb

Port of remove-readme-option to EE

See merge request !1368

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

# Conflicts:
#   app/policies/group_policy.rb

Native Unicode Emojis - EE merge edition

See merge request !1369

Backport "Simplify project payload exposed on Environment endpoints in V4"

See merge request !1345

Fix LDAP DN case-mismatch bug in LDAP group sync

Closes #1338

See merge request !1337

Fixing some preexisting issues (Safari) and some new issues (Windows
Firefox)

Maintain emoji line-height in it's context to avoid cut-off,
(Windows 10) http://i.imgur.com/xmdOLgv.png

This also allows us to get rid of the small bodge for the cut-off in
Safari

It was pulling
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/watch

 - gl_emoji for falling back to image/css-sprite when the browser
   doesn't support an emoji
 - Markdown rendering (Banzai filter)
 - Autocomplete
 - Award emoji menu
    - Perceived perf
    - Immediate response because we now build client-side
 - Update `digests.json` generation in gemojione rake task to be more
   useful and  include `unicodeVersion`

MR: !9437

See issues

 - #26371
 - #27250
 - #22474

Only group owners can set ldap overrides

See merge request !1025

# Conflicts:
#   config/webpack.config.js

In a few circumstances, we saw that the LDAP person would
present the DN in one mix of case while a given LDAP group
member DN list would return the DN in another mix of case.
LDAP group sync was unable to make the match between these
members and it caused created/updated timestamp to be reset
and LDAP overrides to be ignored.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Port of api-drop-subscribed to EE

See merge request !1364

Parallelise the gitlab:elastic:index_database Rake task

See merge request !1361