Another rollback of r10697, which breaks code that was already using
LazyPanel via @UiField(provided = true)

*** Original change description ***

Change default of UiBinder.useLazyWidgetBuilders to true, in
preparation for deleting the old code.


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10718 8db76d5a-ed1c-0410-87a9-c151d255dfc7