There is an old tracker entry MDL-3562 asking to split this resource into two separate ones, one being a link to a local file and the other a link to remote web address. One of the benefits is that they could have better differentiating icons.
I have actually hacked our Moodle into using different icons for the two types. It is really an ugly low-level hack. Local files have an icon depending on their type, whereas remote links all have the same "world-doc" icon.
Blocks
New block idea: external links summary (help please)
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