TouchInterceptor: Fixed image cache problems
Fixes the problem shown in this video:
http://youtu.be/piqHych4nJY

Change-Id: I42f35ddd6677afd10187a7c5a390287acd3f39a9
Settings: Make it clearer how SMS Limiting works and add 500 messages option

Change-Id: Ia7458d7e7cde1cfbb6641d4b05fd9caf59d21db8