对于14.04之前的版本请勿尝试:
参开文章:
http://askubuntu.com/questions/36433/can-i-use-the-unity-launcher-icon-to-minimize-applications-windows
启用:
gsettings set org.compiz.unityshell:/org/compiz/profiles/unity/plugins/unityshell/ launcher-minimize-window true
关闭:
gsettings set org.compiz.unityshell:/org/compiz/profiles/unity/plugins/unityshell/ launcher-minimize-window false