Homepage product thumbnails should fill the screen width

[kristinashu]

In the comps, the homepage products are full width but this was never implemented. I think the desktop layout is ok on the live site but all the medium widths should be full width to maximize the space.

Note:

• the mini seal is should be made small, like in the comps
• light gray padding around each product image should be good but might need to be adjusted
• This ticket sets us up for adding the product titles

Comps: https://redpen.io/p/qz6bdb2811e058ffb1

[mmmavis]

Fixed in PR #2232