Define in the 'More Column' fields all the properties that an
user will be able to display for a main listbox of a module.
The user has to be able to select which columns he wants to see in
order to view the content of a module. The More columns field is also
used in order to generate a default search dialog on a module.
This field has to be defined only for listboxes used in list mode (not used for listboxes inside view forms).
Include all properties that can be useful, like creation date, modification date, creator ...