Assets in Commerce Catalog UI do not sort by SortOrder

Description

Fixed issue where assets in the Commerce catalog are incorrectly sorted.

Preconditions: There are 4 images uploaded to a folder in the Media pane in the Commerce Catalog UI: 1.0.jpg, 1.1.jpg, 1.2.jpg and 2.0.jpg.

Steps to reproduce:

1. Create a new product "TestProduct", then open Assets tab to add following images to the product: 1.0.jpg, 1.1.jpg and1.2.jpg.
2. Open another product/category/catalog, or publish the current "TestProduct" product.
3. Add 2.0.jpg to "TestProduct".
4. Repeat the 2nd step.

Expected: The images in the Assets tab folder for "TestProduct" should display with the correct sort order.
(1.0.jpg, 1.1.jpg, 1.2.jpg and 2.0.jpg.)

Actual: Incorrect sort order for added images (1.0.jpg, 2.0.jpg, 1.1.jpg, 1.2.jpg).