Comment 2 for bug 1071634

Adding also-affects of Design because I don't think this is addressed in the spec.

Let's say, for example, that a user adds locations of London, England and London, Ohio USA.

What currently gets saved in dconf is: ['America/New_York London', 'Europe/London London'] so a low-code-impact change would be to use the timezone information in the label iff there are two locations with the same name.

However, it would probably be more user-friendly for indicator-datetime to save the human-readable text from libtimezonemap. If you go to add London in unity-control-center, the pulldown lists "London (England, United Kingdom)" and "London (Ohio, USA)". So if we can programmatically extract that parenthetical text, it seems to me that's friendlier.