blurry_edges are blurry

BUR #57097 has been approved by @nonamethanks.

create implication blurry_edges -> blurry

blurry edges is used when the edges of an image are blurry. A quick check showed the posts missing blurry were, in fact, blurry.

The bulk update request #57097 (forum #426448) has been approved by @nonamethanks.

This should probably have an utility alias from blurry_border, since that's a subset.