CompoundEditor : Consider modifiers with Editor Focus shortcuts
CompoundEditor : Consider modifiers with Editor Focus shortcuts

Fixes #3546

Fixes
-----

- CompoundEditor : Fixed bug that prevented `Ctrl-N` from working when
  the mouse was over a `NodeSetEditor` (#3546).

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