+1
I think another more broad suggestion was to enable a /popup command to trigger a popup under the cursor, which would be used in ON HOTLINK. This would go along with the menus {}, but I think it probably needs to be fleshed out to be useful to the real world use cases.
Having arbitrarily named menus (like dialog definitions) would be useful for this too. Presumably, it would enable the user to do something like /popup MENUNAME. The menu name of "url" could be used in a hotlink in this way.
