[plt-scheme] unclickable clickbacks in interactions window snips

I discovered that when an expression evaluates to an editor-snip%
object in the DrScheme interactions window, DrScheme actually inserts
the snip into the window. This is wonderful!

But if I add clickbacks to the text displayed by the editor, they
aren't activated when I click the text. The clickbacks work as
expected when I put the same object into an editor-canvas in another
frame.

Is there anything I can do to get the clickbacks to work, or does
DrScheme intentionally block clickbacks from user snips? (The
editor-snip is not created by a tool, just by an ordinary MrEd
program.)

Thanks,
Ryan


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