Renamed showHeader to headerVisibile. Also, allowing this user data for all Parameterised
Renamed showHeader to headerVisibile. Also, allowing this user data for all Parameterised

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