Alt+PrintScreen is impossible with HUD

[Roman Yepishev]

STR:

1. Use HUD-enabled Unity - 5.2.0+bzr1975ubuntu0+644.really1977
2. Open e.g. gedit and move it to the middle of the screen.
3. While window is focused, press Alt+PrintScreen, notice that the screenshot is not taken until you depress alt (probably another bug)

Actual results:
HUD opens gets the focus right before screenshot is taken.

Expected results:
A single window screenshot

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.2.0+bzr1975ubuntu0+644.really1977
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic-pae 3.2.6
Uname: Linux 3.2.0-16-generic-pae i686
ApportVersion: 1.91-0ubuntu1
Architecture: i386
CompizPlugins: [core,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CrashDB: unity
Date: Fri Feb 17 11:17:50 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120119)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)