Adds a min-height: rule to .Content .ProductList .ProductImage refrence in Styles.css.

The current refrence is missing a height attribute and IE doesnt respect max-height property. Setting a min-height causes all of the images to be the same height regardless of the resolution of the image.

https://jira.bigcommerce.com/browse/THEME-513

Before : .Content .ProductList .ProductImage img { vertical-align: middle; }

After: .Content .ProductList .ProductImage img { vertical-align: middle; min-height:275px !important; }