Hide the keyboard in a deferred task.
Hide the keyboard in a deferred task.

This is intended to eliminate the flicker that occurs when one widget hides
the keyboard and then another shows it within the same update cycle.

cbracken/flutter,jason-simmons/flutter,aghassemi/flutter,cbracken/flutter,aghassemi/flutter,Hixie/flutter,cbracken/flutter,Hixie/flutter,aghassemi/flutter,turnidge/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,turnidge/flutter,flutter/flutter,cbracken/flutter,Hixie/flutter,cbracken/flutter,turnidge/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,tvolkert/flutter,cbracken/flutter,Hixie/flutter,tvolkert/flutter,tvolkert/flutter,jason-simmons/flutter,tvolkert/flutter,Hixie/flutter,turnidge/flutter,flutter/flutter,aghassemi/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,tvolkert/flutter,Hixie/flutter,tvolkert/flutter,jason-simmons/flutter,Hixie/flutter,cbracken/flutter,flutter/flutter,cbracken/flutter,tvolkert/flutter,Hixie/flutter,jason-simmons/flutter,turnidge/flutter,flutter/flutter,flutter/flutter,cbracken/flutter,flutter/flutter,flutter/flutter