Fix a disanbiguity introduced with SafeHtml patch

Fix a disanbiguity introduced with SafeHtml patch

When using gwt-2.8.0 and java8 gwt compiler is more restrictive and
when you override a method(Object) with certain classes like
Interfaces or JSO, there is an error like:
The method $(Object) is ambiguous for the type GQuery.

Also updated lazy interface with new methods.