[xmonad] Not passing Mod key to applications

[John Goerzen]

Hi everyone,

In what appears to be typical fashion, I have that pesky Windows key 
(mod4mask) mapped to Mod.  That's been nice because it's mostly unused 
anywhere else.

But the devil is in the word "mostly".

I have to run some Windows VMs and terminals.  They do actually use that 
key.  So when I start to press, say, Mod-5 to switch to a different 
workspace, the Windows session does something as soon as I press mod.

This is even worse with VirtualBox, which somehow prevents xmonad from 
seeing the keypress when VirtualBox is active.

I'd rather have xmonad completely eat all Mod keypresses, and let no 
other application, even those Windows RDP or VirtualBox sessions, ever 
see it.  I don't really ever use it in Windows anyhow, so it's just 
causing annoyance.

For awhile, Google Docs popped up keyboard shortcut help when I'd press 
it over one if its windows.  I think that behavior has now gone away, 
but I'm not certain if it's something they did or something I did.

Is there a quick trick to accomplish this?

Thanks,

-- John