Everything should work like within a normal LibShifterBox: drag & drop (single/multiple entries), buttonsto move the entries
The getFunc must return a pointer to your savedvariables table where the entries of the left/right list are stored!
-> Do not use any pointers of pointers there, the SV needs to be updateable directly with the returned pointer!!!
And setFunc must pass in the same SV table in order to save entries to it properly.
Debug output in the version is enabled at several functions