Based on:

1. 0e85c50252dd43148488eacde57a882bd0b0a4ec
2. d19eaaed2d48e008abf94301a98e8ee806219071
3. 44c7f872219659d107fc01a62c8b5d6778ebbd74
Signed-off-by: Rémy Coutable <remy@rymai.me>

Based on d19eaaed2d48e008abf94301a98e8ee806219071.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Based on d19eaaed2d48e008abf94301a98e8ee806219071.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Based on d19eaaed2d48e008abf94301a98e8ee806219071.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Based on 7d96866eddd7602be19effcce11a3568ed54666d.
Signed-off-by: Rémy Coutable <remy@rymai.me>

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

[ci skip]

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[ci skip]

# Conflicts:
#	.haml-lint.yml
#	Gemfile
#	Gemfile.lock
#	app/assets/javascripts/api.js
#	app/assets/javascripts/dispatcher.js
#	app/assets/javascripts/new_sidebar.js
#	app/assets/javascripts/project_select.js
#	app/assets/javascripts/vue_merge_request_widget/components/mr_widget_header.js
#	app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.js
#	app/assets/javascripts/vue_merge_request_widget/components/mr_widget_related_links.js
#	app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_conflicts.js
#	app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merged.js
#	app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_missing_branch.js
#	app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_ready_to_merge.js
#	app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_wip.js
#	app/assets/javascripts/vue_merge_request_widget/mr_widget_options.js
#	app/assets/stylesheets/framework/variables.scss
#	app/assets/stylesheets/new_sidebar.scss
#	app/assets/stylesheets/pages/merge_requests.scss
#	app/controllers/admin/health_check_controller.rb
#	app/controllers/omniauth_callbacks_controller.rb
#	app/helpers/dropdowns_helper.rb
#	app/models/merge_request.rb
#	app/models/project_import_data.rb
#	app/models/repository.rb
#	app/views/layouts/nav/_new_group_sidebar.html.haml
#	app/views/projects/jobs/_sidebar.html.haml
#	app/views/projects/tree/_tree_content.html.haml
#	app/views/projects/tree/_tree_header.html.haml
#	app/views/shared/_import_form.html.haml
#	app/views/shared/_sidebar_toggle_button.html.haml
#	app/views/shared/issuable/_sidebar.html.haml
#	config/webpack.config.js
#	db/schema.rb
#	lib/api/entities.rb
#	lib/gitlab/usage_data.rb
#	spec/features/merge_requests/closes_issues_spec.rb
#	spec/fixtures/api/schemas/entities/merge_request.json
#	spec/initializers/6_validations_spec.rb
#	spec/javascripts/vue_mr_widget/components/mr_widget_related_links_spec.js
#	spec/lib/gitlab/shell_spec.rb
#	spec/serializers/merge_request_entity_spec.rb
#	spec/services/wiki_pages/update_service_spec.rb
[ci skip]

Align all nav items in sidebar

Closes #36179

See merge request !13392

Fix height of collapsed sidebar items

See merge request !13385

Explain why we use select all for project_url_constrainer.rb

See merge request !13425

Fix Pikaday being undefined

Closes #36207

See merge request !13422

Closes #36207