See https://gitlab.com/gitlab-org/gitlab-ce/issues/39118

Conflicts:
	app/views/ci/variables/_form.html.haml
	app/views/ci/variables/_table.html.haml
	ee/app/views/ci/variables/_environment_scope.html.haml
	spec/javascripts/ci_variable_list/ci_variable_list_ee_spec.js
	spec/javascripts/fixtures/projects.rb

Resolve "Different margins between buttons in tag list"

Closes #42584

See merge request gitlab-org/gitlab-ce!16927

Add missing foreign key and NOT NULL constraints to todos table.

Closes #32282

See merge request gitlab-org/gitlab-ce!16849

More conversions of $.ajax to axios

See merge request gitlab-org/gitlab-ce!16882

Allow moving wiki pages from the UI

Closes #37273

See merge request gitlab-org/gitlab-ce!16313

Resolve "`Set up CI` => `Set up CI/CD`"

Closes #42684

See merge request gitlab-org/gitlab-ce!16870