menu item shortcuts don't consistently propagate to the DOM
Some menuitem shortcuts don't pass their events on to the dom, while others do. I think it happens when a double-modifier has keys in common with a single-modifier.
<ctrl-shift-v> creates a vsl, but the key gets sent to Pd. However,
<ctrl-shift-h> creates an hsl, and does not send a key to Pd.
The result is that for one you get a "floating" iemgui that follows the mouse, and the other gets anchored. (Can't remember which happens with vsl and which with hsl, but I'm not in front of a running instance of Pd atm.)
<ctrl-v> is bound to "paste" and
<ctrl-h> isn't bound to anything, that may somehow be causing an inconsistency.