What you're actually asking for is SUBSTANTIALLY harder than just enabling an icon. What you're really asking for is:
"Include in the type information of a VI refnum wire information not just about the conpane but, when that refnum originates from a static VI reference, include all the path/name information as well so that no matter what nodes the wire passes through before it hits the CBR node, the wire still carries enough information to look up the icon and display it."
Essentially, the VI Refnum wire becomes a typedef wire when it is sourced at a static VI ref.
Not that any of this is a bad idea. I'm just clarifying the idea.
My work around is to copy the Icon from the Strict Type Def VI and I then drop it onto the Call by Reference Node. The ICON gets in the way of wiring so I drop the ICON once the Call by Reference Node is all wired up. It really helps with multiple Call by Reference Nodes.
