please use a different modifier key

Unity's HUD seems to be triggered with the Alt key. This is insane as most users have been using Alt + Tab key combination to switch between windows. This, many a times, leads to the HUD getting triggered while trying to switch in between windows, which is quite annoying and unproductive.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.2.0+bzr1971ubuntu0+644
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
Uname: Linux 3.2.0-16-generic x86_64
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,resize,regex,snap,imgpng,move,vpswitch,place,grid,animation,mousepoll,gnomecompat,wall,expo,session,workarounds,fade,scale,ezoom,unityshell]
CrashDB: unity
Date: Wed Feb 15 21:18:41 2012
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-01-24 (21 days ago)