"Show desktop" icon gone from launcher and from CCSM

[Walter Garcia-Fontes]

After updating to Unity 6.6.0 the "Show Desktop" icon in the launcher is gone and I cannot enable it back at CCSM.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: unity 6.6.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-15.23-generic 3.5.4
Uname: Linux 3.5.0-15-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.5.2-0ubuntu4
Architecture: amd64
CompizPlugins: [core,composite,opengl,decor,grid,snap,regex,mousepoll,place,imgpng,gnomecompat,move,unitymtgrabhandles,compiztoolbox,wall,vpswitch,animation,resize,fade,session,expo,workarounds,ezoom,scale,unityshell]
Date: Tue Sep 25 14:01:17 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
SourcePackage: unity
UpgradeStatus: Upgraded to quantal on 2012-09-10 (14 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Hanine HAMZIOUI (hanynowsky)]

This should not be a duplicate as it's a regression bug rather.
 Bug #681348 was fixed and the Minimize All desktop Icon was added to the launcher in Ubuntu 12.04 and redesigned in Ubuntu 12.10 (Alpha and BEta 1).

Now it disappeared. If not really a bug, then is it a new decision to take off this feature for good and do with the emabarrassing:
CTRL+SUPER+D ?

Besides, after this same update Mounted Drives (ext4, NTFS. partitions...) no more are sticked to the launcher and there is no way to enable this back.