Instead of a generic file icon when invoking the HM context window containing one or more file links, the use of the MacOS Quick View icon for each file instead on those file links would provide useful instant visual info as to the contents of each of those links.
Additionally, for browser links, the use of HTML Favicons instead of generic browser icons would similarly be useful.
Other applications may also allow for more icons that are more relevant/informative than generic ones based upon the specific information being linked.