2021-03-25-reworked-nested-line-item-handling-for-checkout.md

title	issue
Reworked nested line item handling for checkout	NEXT-14313

Storefront

• Changed nested Line Item behaviour to have a collapsable children Line Item box instead of separate, displayed items
• Added new template files in platform/src/Storefront/Resources/views/storefront/page/checkout/:
  • checkout-aside-item-children.html.twig
  • checkout-item-children.html.twig
• Added new style sheet files in platform/src/Storefront/Resources/app/storefront/src/scss/page/checkout/:
  • _aside-children.scss
  • _cart-item-children.scss