Lock screen weather: Simplified 'no-data' layout & refresh indicator

This commit simplifies the no-data layout of the lock screen weather by
replacing confused Cid, adding "No data" text and hiding the temperatures
on the right.  It also adds a simple "Refreshing" indicator when the user
taps on the weather panel to refresh.

Screenshots:

Change-Id: Ide0bf3134add99ea0b27b90a36f063c37dddb90b
http://dl.dropbox.com/u/50993944/Screenshot_2012-06-02-08-56-36.png
http://dl.dropbox.com/u/50993944/Screenshot_2012-06-02-09-51-47.png