Fix for console errors on server

[zenweasel]

Resolves #3024

To Test

1. Create a second shop and create a product in it
2. Go to the main shop and place an order with only that product in it
3. Observe there are no errors in the console
4. In order confirmation email, observe that the information there is correct

Additional testing

5. Add item from main shop and newly created item in step 1 above to cart and checkout
6. Go through with steps 3 and 4 above

[kieha]

@spencern @zenweasel question on this: is the shipping applied per shop or is it only once? I.e. with 2 items from different shops, will the shipping charge be applied per shop or just once for the two items?

[zenweasel]

@kieha When you have a shipping charge it's applied twice e.g. if you have a $2.99 charge it's $2.99 for one shop and $2.99 for the other for a total of $5.98.

You should be basically able to sum the shipping charges from the shipping records to the final charge.

[kieha]

@zenweasel if you could also review this, would be super. Couldn't add you as a reviewer to your own PR.

[zenweasel]

@kieha It's ready to go or?

[kieha]

@zenweasel yup.

[zenweasel]

@kieha @spencern I made a couple of little changes but this seems to be working for me

[spencern]

LGTM 👍
Email issues that I had before are fixed.