Deployment form/cart/account refactoring and other bug fixes

[lauraluiz]

• Forced developers to add scope to credentials (if you don't, an error will occur).
• Cleaned session and retry on 401/403 errors.
• Allowed different header/footer components per page.
• Abstracted and improved style of forms, carts/orders and customer account.
• Removed global SelectBoxIt, now you need to import it on demand in your component.
• Removed manifest icons that yielded errors.
• Fixed flaky tests.
• Updated dependencies.