Issue 5478 looked fairly easy as we can leverage CellList's existing ProvidesKey support.
While doing this, I noticed ValuePickerTest didn't exist, so I heavily copy/pasted a new one based on ValueBoxListTest as it faces the same boundary conditions. ValuePicker did not implicitly add setValue'd entries like ValueBoxList does, so I updated it do that so it would be consistent. It's also currently using the "use 1st acceptable value if not set" approach from the pending ValueBoxList change. http://gwt-code-reviews.appspot.com/1614807/ -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
