v1.5.420:
1. Fixed a crash with switches on Android 4.1 devices. (unverified)
2. Increased delay on proximity sensor monitoring. should fix some bugs.
3. Added Sony clock to Widget clock list.
4. Added some apps to be blacklisted as lock screens.
5. Try to fix notification opening issue.
6. Added null check on icon manager.

git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@346 21922344-3934-ee51-d6e3-fd981ce84c01