Updated UIEditor for PathListingWidget changes.
Updated UIEditor for PathListingWidget changes.

We were relying on using a column where the data used for sorting was different to the data used for display. This isn't supported in the new PathListingWidget implementation. Instead we now disable sorting on the PathListingWidget and use a custom EntryPath which ensures the right order in _children().

andrewkaufman/gaffer,hradec/gaffer,johnhaddon/gaffer,ivanimanishi/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,ivanimanishi/gaffer,GafferHQ/gaffer,chippey/gaffer,hradec/gaffer,hradec/gaffer,goddardl/gaffer,johnhaddon/gaffer,goddardl/gaffer,hradec/gaffer,appleseedhq/gaffer,GafferHQ/gaffer,appleseedhq/gaffer,ImageEngine/gaffer,goddardl/gaffer,ivanimanishi/gaffer,boberfly/gaffer,GafferHQ/gaffer,appleseedhq/gaffer,appleseedhq/gaffer,ivanimanishi/gaffer,johnhaddon/gaffer,hradec/gaffer,andrewkaufman/gaffer,ImageEngine/gaffer,chippey/gaffer,johnhaddon/gaffer,boberfly/gaffer,chippey/gaffer,goddardl/gaffer,chippey/gaffer,boberfly/gaffer,andrewkaufman/gaffer,lucienfostier/gaffer,boberfly/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,lucienfostier/gaffer,lucienfostier/gaffer,lucienfostier/gaffer,ImageEngine/gaffer,GafferHQ/gaffer