Later button cancels UI tutorial nag

Further refactoring for maintainability
Bugfix: Delete log in preferences causes NPE due to refactored Activity name

Removed redundant XML for force phone UI/logging
All reference to WifiFixerActivity changed to MainActivity
Checking in wakelock changes for test build
LocalNetworksFragment removes its orphaned backstack entries onResume

Refactored to use network disconnect intent for network disconnect event