Gets whether the context attribute is marked as on.
Namespace: Programmer.Editor.Fixtures.ContextAttribute
ActionScript.SetProperty(Programmer.Editor.Fixtures.ContextAttribute.IsOn,[value])
http://[ip]:4430/titan/get/2/Programmer/Editor/Fixtures/ContextAttribute/IsOn
POST /titan/set/2/Programmer/Editor/Fixtures/ContextAttribute/IsOn