When clicking the "Files" icon in the Unity launcher, instead of switching to the already opened nautilus window, a new nautilus window is opened

[Anish Dowlut]

Ubuntu version: 14.04 LTS
Nautilus version: 1:3.10.1-0ubuntu9.1
Unity version: 7.2.1+14.04.20140513-0ubuntu2

Sometimes, when you already have a nautilus window opened and you switch to another application, if you the click "Files" icon in the Unity launcher to switch back to that nautilus window, a new nautilus window is opened instead simply showing the nautilus window that was already opened.

Steps to reproduce problem:
0. Close all nautilus windows.
1. Click on the "Files" icon in the Unity launcher to open a new nautilus window.
2. On the left pane of nautilus, under the Devices section, open a partition or hard drive of your computer which is not the root partition of your Ubuntu installation.
3. Switch to any other application (such as the Caculator or a Terminal window) using the Unity launcher.
4. Click on the "Files" icon in the Unity launcher to switch back to the nautilus window that you had opened.

Expected behaviour: The nautilus window opened in step 1 is focused.
Actual behaviour: A new nautilus window is opened.

The problem can be reproduced by the following steps as well:
0. Make sure no nautilus window is opened.
1. Click on the Trash icon in the Unity launcher.
2. Click on the "Files" icon in the Unity laucher.

Expected behaviour: The nautilus window which opened when the Trash icon was clicked is focused.
Actual behaviour: A new nautilus window is opened.

The reason I believe that the bug lies within nautilus is because I tried the first set of steps with the Thunar file browser and the problem did not occur. However, it could be a bug within the Unity launcher as well.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: nautilus 1:3.10.1-0ubuntu9.1
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Jun 20 18:38:50 2014
GsettingsChanges:

InstallationDate: Installed on 2014-06-10 (9 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)