DeskClock: Request user to confirm power-on device on power-off alarm event

Show a dialog to request user confirmation to power on the
phone when power-off alarm pops up and user dismisses it.
On user confirmation power-on the phone.Otherwise,keep the
phone switched off.

CRs-fixed: 637275

Change-Id: I20250fa3a86bc51cfaa3bd8b26906755f2726556
WorldClock:The Next icon is not working when search city on World clock

The Next icon is not working when search city on World clock

Change the Next icon to Done icon, when tap the Done icon, hide the
SoftInput.

CRs-Fixed: 655251

Change-Id: I40944db97cbd285f70556c0afb4dab9498221b19