Product detail image gallery has strange behavior about reaction

[saarmstrong]

We need to swap the selected image / primary image on mouseover:

http://jsfiddle.net/saarmstrong/j4R37/2/

[saarmstrong]

15dfc6aa8e7b21bbfd59a2b191fa754083b9e32a Fixes #43: made product detail image gallery work better

[aaronjudd]

Looks like this broke drag and drop re-ordering of images when user is an admin. When the normal user just hovers off image gallery some funkiness is happening where the gallery shows multiple images that aren't really the images that are supposed to be there as well. In the screenshots below there should be 5 unique images.

[saarmstrong]

• added img element to contain selected image and no longer fade out selected image
• fixed sorting of images in the gallery when using drag and drop

[aaronjudd]

Drag and drop seems to be working, but the primary image display doesn't always work.

[saarmstrong]

Updated the JS to swap images on mouseenter. Admin reordering will reactively update end user images, but complete ordering will only be displayed on page refresh.