Load improvements related to MR widget [EE]

See merge request !1935

Update docs for multiple assignees

See merge request !1940

Set navbar-gitlab z-index to 400

See merge request !1938

MRWidget: Remove approved from serializer.

See merge request !1933

Refactor pipeline schedules docs

See merge request !1926

[EE] Enable the RSpec/EmptyExampleGroup cop

See merge request !1930

Refactored the anchor tag to remove the trailing space in the target branch

See merge request !1931

Port of mk-fix-issue-1843 to EE

See merge request !1925

Fixed assignees tooltip clipping in sidebar

Closes gitlab-ce#32512

See merge request !1928

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

Gitaly local branches

See merge request !1751

Add a user's memberships when logging in

Closes #906

See merge request !1819

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/32512

Add "API" to all API docs

See merge request !1922

Merge branch '31987-automatically-close-assignee-select-dropdown-after-selection-when-multiple-assignees-is-disabled-ee' into 'master'

Automatically close user dropdown for CE (EE Version)

See merge request !1921

Older namespace records may be both `type == ‘Group` AND `owner_id` is not null.

Fix participants css

Closes #2423

See merge request !1924

Fix unassigned checkmark (EE Version)

See merge request !1919

Apply CE patch for fe_guide/testing.md updates

See merge request !1915

If TestEnv#set_repo_refs fails, clean test repos and retry

See merge request !1905

Remove max select for multiple assignees

Closes #2418

See merge request !1918

[EE] Resolve "Make the DB name a suffix of the first part of jobs' name"

See merge request !1820

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