Fix API group/issues default state filter

Closes #23655

See merge request !10253

Labels support color names in backend

Closes #28424

See merge request !9725

Make CI build to use optimistic locking only on status change

Closes #29679

See merge request !10152

New Technical Articles guidelines

Closes gitlab-com/gitlab-docs#89, gitlab-com/gitlab-docs#87, and #29525

See merge request !9984

use correct first/last symbols in vue pagination component

Closes #29950

See merge request !10278

Make user mentions case-insensitive

Closes #24493

See merge request !10285

Remove duplicated tokens in issuable search bar

Closes #27293

See merge request !10167

Update rugged to 0.25.1.1

Closes #17325, #14972, and #14765

See merge request !10286

iPython notebook viewer

See merge request !10017

Improve the MR guidelines from the CONTRIBUTING guide

See merge request !9967

Fix link togglers jumping to top

Closes #29414

See merge request !9918

API: Make the /notes endpoint work with noteable iid instead of id

Closes #29871

See merge request !10258

Adds restart method and auxiliar callback to polling class

See merge request !10223

Add tooltip to user's calendar activities

Closes #28925

See merge request !10123

Fixed labels icon being hidden in collapsed issuable sidebar

Closes #29751

See merge request !10107

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/29414

This reverts commit cde35cb2

Merge branch '30098-banzai-filter-mergerequestreferencefilter-has-an-n-1-query-problem' into 'master'

Resolve "Banzai::Filter::MergeRequestReferenceFilter has three N+1 query problems"

Closes #30098

See merge request !10252

Don't include branch name in Knapsack report file

See merge request !10284

Refactored the user callout class

Closes #29955

See merge request !10213

[ci skip]

Remove spreadString in favor of polyfilled Array.from

See merge request !10203

Fix environment folder route when special chars present

Closes #29922

See merge request !10250

Fixed alignment of tooltip on card assignee

Closes #30123

See merge request !10261