Remove bootlint which takes 1 second of render time on development

Closes #37657

See merge request !14167

Adds drop shadow to the expanded sidebar

Closes #36750 and #13983

See merge request !13994

Shadow is added in sm & md breakpoints. Clicking the anything outside of
the sidebar also hides collapses the sidebar at these breakpoints.

Closes #13983

Revert "Add option to change navigation color palette"

See merge request !14148

[CE] Fix small typos in LDAP documentation

See merge request !14153

Docs: quick fix - indexes project settings

See merge request !14158

Fix GitLab QA for new navigation enabled by default

See merge request !14134

Update dependencies license list for 10.0

See merge request !14137

Update license templates for 10.0

See merge request !14136

Revert "Merge branch '35012-navigation-add-option-to-change-navigation-color-palette' into 'master'"

This reverts merge request !13619

Docs new index for project's settings

Closes #35719

See merge request !13552

Fix tooltip width on collapsed issue board column titles

See merge request !14129

Clarify yaml hidden keys (jobs)

Closes #37480

See merge request !14110

Tweak column widths on two factor warning messages

See merge request !14112

Adds a better explanation for alignment section

Closes #32071

See merge request !14109

Resolve "Wrong link for write test in CONTRIBUTING.md"

Closes #37618

See merge request !14138

update gpg_signed_commit to use 0xLONG format for gpg list keys

See merge request !13839

Print notes number explained in the graph.

Closes #37224

See merge request !13949

clarify that only some Runner Executors have these security concerns

See merge request !14068

Exclude migration-paths job when executing docs-only jobs

See merge request !14133

[ci skip]

Move issues index variable setting to a method

See merge request !14048

Fix a "Wrong number of arguments" error in TreeHelper#flatten_tree

Closes #37569

See merge request !14119

Supports additional colors and labels for the prometheus monitoring dashboard

Closes #34629

See merge request !14065

Printing just `[<number>]` was confusing - it looks like a ghost branch or something.
Add `note` (or `notes`, depending on number of notes) to give some details of what this number means.
Refactor code to follow DRY principle.