So, I have a dialog with a list box of layer names - but only the first major group.
I would like to select a layer, select the 'next' button, and repopulate the list with the layers under the major group with the next minor group.
In this case, select C-ROAD, hit 'next', list would repopulate with all the C-ROAD-**** layers.
Can this be done without closing current dialog and reopening another one?