Add timezone info to the cities in the first tab

[morfikov]

The first tab in the Simple Clock app shows the clock and optionally clocks for different time zones. There's only info about the city and the current time. It would be nice to display also the time offset for that city. So for example:

Los Angeles              14:09
vs.
Los Angeles (GMT-8)      14:09

Or place the time zone under the city name, since there's plenty room below it.

This info is sometimes useful when you don't really want to check for the current time for a given city, but you want to know what the time offset is.