unity: default shortcut to minimize all windows too complicated

[Redmar]

The default shortcut to minimize all windows on the current workspace is "Control + Alt + D". I think it would be better to change this to "Super + M", which is:
1) Easier to type and remember
2) what Windows uses, so it would be familiar for most users.

I know it is past all the freezes for Precise already, but I was wondering if it would be possible to add "Super + M" as a second shortcut to trigger "minimize all". This way, there have to be no changes in the UI, and 'naive' users can still use "Super + M" to minimize windows, as they would expect.

Thanks!

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.8.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
Uname: Linux 3.2.0-22-generic i686
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu1
Architecture: i386
CompizPlugins: [core,composite,opengl,decor,compiztoolbox,gnomecompat,regex,move,vpswitch,mousepoll,snap,grid,imgpng,resize,place,animation,resizeinfo,wall,workarounds,unitymtgrabhandles,session,fade,expo,scale,ezoom,unityshell]
Date: Wed Apr 11 13:11:56 2012
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110426)
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-03-10 (31 days ago)