update any images after an upload.
update any images after an upload.

after upload refresh existing images.
This means when a user uploads a new SiteIcon it shows up in their backstage and updates
elsewhere.. yey!

FND/tiddlyspace,TiddlySpace/tiddlyspace,FND/tiddlyspace,TiddlySpace/tiddlyspace,FND/tiddlyspace,TiddlySpace/tiddlyspace