Key modifiers are now correctly updated during drags.
Key modifiers are now correctly updated during drags.

Before this they were stuck with the values they had at the start of the drag.

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