Group editing

I have been group editing my drum tracks with using hitpoints, splitting and quantizing.
I used the glue tool to make it more organized, but then I got a problem when I want to go back and edit the slices.
When I double click on a track to edit (have to do thos after glueing) group editing is not active although all tracks show in the window.

Is there any way to activate the group editing after double clicking a track?