Enable cross sell products

[crftwrk]

Closes #542

Test

• Go to shop https://dev.bootscore.me/shop/ and add "Album" and "Beanie with Logo" to the cart
• Go to cart page

@justinkruit if you like it, merge it.

[justinkruit]

Maybe there is a different way to do this, instead of overriding the col sizes with css which I personally don't find very clean.

Maaaayyybbee we can make the cols a filter? And write a check if it's the cross sells list, and then override the cols.

[crftwrk]

Maaaayyybbee we can make the cols a filter? And write a check if it's the cross sells list, and then override the cols.

Of course, any idea?

[justinkruit]

@crftwrk I've added 2 commits to the PR, which changes the cols into a filter and makes it 6 cols wide on the cart page.

[crftwrk]

Much more better, thank you!