music app can be launched several times from music scope

[Jean-Baptiste Lallement]

mako 20130924.1

TEST CASE:
1. Load some music on your phone and refresh the music scope to make it appear (reboot, search, ...)
2. Go to the music scope and play a song
3. Switch to Home scope then to Music scope without closing the music app
4. Play another song
5. Switch to application scope

EXPECTED RESULT
The first instance of the music scope is reused to play the second song

ACTUAL RESULT
A new instance is launched and 2 are running simultaneously. This can be verified by connecting to the phone over adb or ssh and counting the number of music app instances in the output of ps.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: indicator-datetime 13.10.0+13.10.20130913-0ubuntu1
Uname: Linux 3.4.0-3-mako armv7l
ApportVersion: 2.12.4-0ubuntu1
Architecture: armhf
Date: Wed Sep 25 13:10:25 2013
InstallationDate: Installed on 2013-09-24 (0 days ago)
InstallationMedia: Ubuntu Saucy Salamander (development branch) - armhf (20130924.1)
MarkForUpload: True
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
SourcePackage: indicator-datetime
UpgradeStatus: No upgrade log present (probably fresh install)