Viewer : Add support for tool shortcuts.
Viewer : Add support for tool shortcuts.

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