* The qt backend tabular editor no longer throws exceptions with the 'selected' traits are set to an invalid value (this behavior mimics that of the wx tabular editor).
* The qt backend tabular editor no longer throws exceptions with the
'selected' traits are set to an invalid value (this behavior mimics
that of the wx tabular editor).


brett-patterson/pyface,geggo/pyface,pankajp/pyface,geggo/pyface