bindings are now fully hierarchical. In addition, DOM windows, input fields
and textareas can pull their key bindings from a separate XUL file. This
allows configurable key bindings.
Massive rewrite of the command dispatcher system. The command dispatcher now
deals with DOM windows in addition to DOM elements. It now tracks both
successfully and works in conjunction with the new focus/blur architecture.
r=saari
git-svn-id: svn://10.0.0.236/trunk@55718 18797224-902f-48f8-a5cc-f745e15eee43
