ScriptWindow : Don't stop event loop if it's already stopped.
ScriptWindow : Don't stop event loop if it's already stopped.

This is primarily for the use of the screengrab app, which manages the event loop itself.

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