shift-tab impossible on X with vtkXRenderWindowInteractor

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

There is no way to get a ctrl-tab event.
I get NULL for the ascii and NULL for the keysym.

A possible fix is: at about line 605 in vtkXRenderWindowInteractor.cxx replace me->SetEventInformationFlipY(..... buffer); with me->SetEventInformationFlipY(..... XKeysysmToString(ks));

Not sure if this fix is already in the beta, but I'm logging this as a bug just to be sure.