Change EcommerceService's is_enabled to accept User instead of request

. And change the verification link in the sidebar to redirect to new basket if the EcommerceService is enabled.

common/djangoapps/student/views.py

@@ -743,7 +743,7 @@ def dashboard(request):
     }
 
     ecommerce_service = EcommerceService()
-    if ecommerce_service.is_enabled(request):
+    if ecommerce_service.is_enabled(request.user):
         context.update({
             'use_ecommerce_payment_flow': True,
             'ecommerce_payment_page': ecommerce_service.payment_page_url(),