Pressing the Super key inside a VMWare Horizon View window causes the Shortcut Overlay to pop up

Hi,

I often work with remote machines through VMWare Horizon Client. Whenever I use shortcuts with the Super key inside a remote machine, Unity thinks I'm long-pressing it, and shows me the Shortcut Hints Overlay, and also highlights icon numbers in the Unity Launcher. The main point here is the overlay pops up immediately, even though the Super key pressed and released in a split second.

This should happen only when the Super key is long-pressed outside of VMWare Horizon Client. This issue is reproducible on Ubuntu 14.10 and 15.04, VMWare Clients 2.2.0 (available in the official repos for Trusty as vmware-view-client) and 3.2.0 (from VMWare's website).

I understand that it may not be a Unity problem, but rather the way the Horizon Client handles keys grabbing. Hopefully, there's a way to fix or a workaround it on the Unity side.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: unity 7.3.2+15.04.20150420-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Mon May 4 09:07:02 2015
InstallationDate: Installed on 2015-04-25 (8 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)