Clean up XBL bindings and eliminate redundancies and errors.
Fix a bug in which XBL bindings didn't check for event cancellation.
r=brade sr=hyatt
git-svn-id: svn://10.0.0.236/trunk@205389 18797224-902f-48f8-a5cc-f745e15eee43
widget-toolkit) and into communicator (i.e. core).
Also remove the obsolete files platformInputBindings.xul and
platformTextAreaBindings.xul: text controls use XBL bindings now,
and the XUL bindings are no longer used. r=ben,saari
git-svn-id: svn://10.0.0.236/trunk@205217 18797224-902f-48f8-a5cc-f745e15eee43