Shipping Estimator loads NTFD when SERT doesn't have URI

[steveosoule]

Expected Behavior

Using the Shipping Estimate should load the SERT page and return rates; even if SERT doesn't have a canonical URI.

Current Behavior

Shipping Estimator loads the NTFD page (when the SERT page doesn't have a URI)

Attempted Fixes

Update https://github.com/mivaecommerce/readytheme-shadows/blob/master/editable_templates/shadows/mm5/BASK-shipestimate-item.htm#L4 from method="get" to method="post"

Steps to Reproduce (for bugs)

1. Find a store that doesn't have a URI on the SERT page (some legacy Miva stores), or just delete the SERT page's URIs for replication sake.
2. Add a product to your basket: https://ssoule.mivamerchantdev.com/store/sample-category/miva-test_master-product.html
3. Navigate to the BASK page: https://ssoule.mivamerchantdev.com/store/basket-contents.html
4. Click the "Estimate" button.
5. Fill out the fields in the modal.
6. Click the "Calculate" button
7. It loads the NTFD page instead of the SERT page