Check under Customize->Customize User Interface. If the command is available in there you can assign your own shortcut if there's nothing assigned by default.
update Finished a pugna wand , that default effect its killing it tho . workshop link : http://steamcommunity.com/sharedfiles/filedetails/?id=196493839
In your scene is only the default (root) namespace which is always there and which can be ignored. Reference your rig into an empty scene, and it will be in a namespace.