Combobox Suggestions / Autocomplete in script dialogs

In Windows Forms it is possible to autocomplete / suggest contents of a combobox (think of the name field in open/save dialog). It would be great if the Combobox in DOpus dialogs could have the same useful feature.
I'm currently working on a modification of an existing script that someone posted here (cant find it right now). It is about moving selected files to a named folder. When entering the desired name, it would handy if the combobox would suggest the names of existing folders (and maybe even autoappend it). I already added the names of the folders to the combobox but i cant find a way for autosuggestions.
And clicking the dropdown to see the names isnt handy either way.