Selecting a location replaces the default location and location listed twice

[Jean-Baptiste Lallement]

TEST CASE:
1. Add a location different from the default location (eg default is 'Paris' and add 'Dublin')
  2.1. Click on datetime indicator, select 'Date & Time Settings...'
  2.2. On the preferences dialog, go to the 'Clock' tab, click on 'Choose Location'
  2.3. Click on '+' and add a location different from the default location (Dublin)
  2.4. Close the 'preferences dialog'
2. Click on the datetime indicator
  -> Verify that the list below the calendar contains in this order:
    * Paris
    * Dublin
3. Click on Dublin

Result:
Dublin replace 'Paris' and is listed twice.
The user needs to reconfigure the default to readd the default location.

Expected:
The selected location appears in 1rst position on the list, and the default location is still present on the list
OR
The dot in front of the location move to the selected location.
Each location is listed only once even when it is selected

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: indicator-datetime 0.2.90-0ubuntu4
ProcVersionSignature: Ubuntu 3.0-2.3-generic 3.0.0-rc4
Uname: Linux 3.0-2-generic i686
Architecture: i386
Date: Fri Jul 1 16:04:41 2011
EcryptfsInUse: Yes
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: indicator-datetime
UpgradeStatus: Upgraded to oneiric on 2011-06-27 (4 days ago)