[syslinux] Suggestion: MENU DISABLE and MENU HIDE for submenus

[Ady]

Hello Syslinux Team,

As known, the "MENU DISABLE" and "MENU HIDE" directives are valid 
only after a LABEL directive. In addition to their main purpose, they 
are sometimes useful for troubleshooting / simplifying / improving 
(sections of) menus, without having to temporarily delete or comment 
out (possibly large) parts of an already-existent menu.

I'd like to suggest, if it is possible, the extension of these two 
directives, so to be also applicable to submenus. A submenu "parent" 
entry would be either disabled or hidden, respectively, just as a 
simple menu entry is currently affected by these two directives.

I wish I had the necessary skills to pursue this suggestion by 
myself. Since I don't have them...

TIA,
Ady.