#226 ttk::combobox : enhance dropdown list

[Jean-Marie Cuaz]

Subject : Make the width of the dropdown list of ttk::combobox configurable (and/or add the possibility to have a 2 columns dropdown list)

When the user has to select an item in a popdown list of a combobox, it is sometime desirable to show beside each entry in the list a short text giving explanation about the choice to be selected. This is particularly usefull in database applications when the choices to be made are keys/abreviations not easy to remember for the user.
In that case, it would be nice if the width of the popdown list could be configurable and not be depedant of the width of the text field of the combobox.

Thanks a lot

Jean-Marie