Mouse Click Context Menu Instead of Mouse Down

Currently you have to mouse press and hold on to the tab in order for
the context menu to pop up. The menu will disappear on mouse release.

I think it would be more usable if you can mouse press and release for
the menu to pop up and remain up, until you click elsewhere for the
menu to disappear.

I tried to write this in cfg_ioncore.lua :
mclick("Button3@tab", "mod_menu.pmenu(_, _sub, 'ctxmenu')"),

It does not work.
Would anyone be interested in implementing something like this in the future?

Thanks