Clocks need to sync better and use the same backend

[Dave Morley]

There are currently 3 clocks. The welcome screen, the indicator and the app.

If I set the City in the clock app, it does change the tzdata module to update the other 2 clocks.
If I then update the tzdata on the system so the indicator tells the right time the clock app is now out by and hour.
If the phone is powered up but left on the welcome screen and allowed to sleep when you wake the phone back up the clock on the welcome screen is still saying the time when it slept.

All these clocks need to be in sync, If you change one it should automatically change them all. The only exception I can see being multiple time zones you may want to leave that on just the clock-app.

[Nekhelesh Ramananthan (nik90)]

Currently when you set the city in the clock app, it *does not* change the tzdata module. So if you change the city in the clock-app, it will not reflect in the welcome screen and the indicator. If you update the tzdata on the system, it is supposed to change in the clock app as well, however currently the clock app does not do that. It is a bug in the clock app which is being looked into.

[Ubuntu Phone Apps Jenkins Bot (ubuntu-phone-apps-jenkins-bot)]

Fix committed into lp:ubuntu-clock-app at revision 205, scheduled for release in ubuntu-clock-app, milestone final-1.0