WedgeUI : Fix string mode.
WedgeUI : Fix string mode.

Fixes #1539.

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