Fixed error which could occur when a non-focussed PathChooserDialogue received a click.
Fixed error which could occur when a non-focussed PathChooserDialogue received a click.

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