Resolve "Making it easier to configure approvals in project settings"

Closes #1738

See merge request !1527

Add information about namespace encoding to API docs

See merge request !1612

[ci skip]

Fix markdown table in API Issues docs

See merge request !1596

[EE] Remove the User#is_admin? method

See merge request !1615

Update rubocop-rspec 1.12.0 -> 1.15.0

See merge request !1609

EE port of "Start discussion"

See merge request !1556

Update droplab to webpack version ee

See merge request !1608

Port of button-capitalisation for EE

See merge request !1590

EE port of "Copy diff file path as GFM"

See merge request !1589

Add user cohorts table to admin area

Closes gitlab-ce#29551

See merge request !1545

Make deploy board be visible by default

Closes #2106

See merge request !1595

fix test and lint

clear hidden inputs after posting update