Total Commander

Any IDE suggest function names, when you start typing first letters.
E.g. I can type "cre", and get dropdown with "CreateFile | CreateWindows | ..."

The same feature I wanna for Create Folder dialog - when I type some letters, please, suggent me all variants from both panels (including file&folder names)

I think this is not very popular request. BTW, folder creation is the thing that easilly may be done with external tool, so we don't need to overload TC code with such extensions. Try to search Web for such folder creator.