Fixed a couple of bugs:

1. top view position is not restored if select a lower text field and then navigate back to upper ones via the toolbar previous button.
2. apply the resign/become active workaround for both UITextView and UITextField as in iOS 7 the keyboardWillAppear event could be fired either before or after textDidBeginEditing event. It’s not a predicatble sequence.
3. added a fix for UITextView bug.
4. some other minor fixes