fixes:
screen on/off intents are shown in "Show intents" preferences;
help text for "Watched intents" screen;
numbers in "Show intents" and "Watched intents" preferences;
friendly wi-fi names in log;
fixed settings filtering (sqlite true is 1);
"Show application events" unchecking works;
hide problems when unchecking "Show application events";
user can add custom watched intents;
"Watched intents" screen contains only user added intents;
small EventIntent abstract class refactoring;