SceneInspector : Fix section disabling
SceneInspector : Fix section disabling

The global sections would fail to be re-enabled after their first disabling. This was broken in 0185372c076b089ee705b352b56d9c7434e609a5.

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