Undock option for tabbed group

I've notice there is an "Undock" option if I right click on a tab in a 
view but it is greyed out. Is there an example somewhere of how to 
enable this so a tab can be undocked to be in its own window?

I looked in the TraitsGUI_3.1.1/examples/dock directory but the examples 
all have UnDock greyed out.

BTW just upgraded my Dell notebook to Windows 7 Home Premium and 
installed EPD 6.0.4 and everything is working well. I'm going to retire 
my Vista partition.....and maybe replace it with Linux - I presume I 
should go for Ubuntu rather than Fedora given the preference for Ubuntu 
on the mailing list.?

Brennan