Multiple ajax submit

Problem/Motivation

Steps to replicate the problem:

1. Click "Add to cart" button, the product is added to cart
2. Without page refresh, click the "Add to cart" button again, you will two throbbers
3. Clicking the button again, without page refresh, and you will see four throbbers

Proposed resolution

Seems like the ajax operation is appending another request to the add to cart form. Make sure the form is resetted once the product is added to cart.

Remaining tasks

N/A

User interface changes

N/A

API changes

N/A

Data model changes

N/A