Remove Turbolinks

Closes #25624

See merge request !8570

Add issues to boards list

Closes #26205

See merge request !8737

Adds /target_branch slash command functionality for merge requests

Closes #23619

See merge request !7216

Remove unnecessary queries for .atom and .json in Dashboard::ProjectsController#index

Closes #27267

See merge request !8956

replace words user(s) with member(s)

Closes #25460

See merge request !8872

Merge branch '27332-mini-pipeline-graph-with-many-stages-has-no-line-spacing-in-firefox-and-safari' into 'master'

Resolve "Mini pipeline graph with many stages has no line spacing in Firefox and Safari"

Closes #27332

See merge request !8886

Resolve "Rename "Builds" to "Pipelines", "CI/CD Pipelines", or "Jobs" everywhere"

Closes #17662

See merge request !8787

Improved ref switcher dropdown performance

Closes #18202

See merge request !7239

Added some error handling which reverts the frontend data changes &
notifies the user

Fixed users href path being incorrect

Changed how components are added in objects

Does not remove the issue from the selected tab when it it de-selected, it instead gets purged when changing tab