[Feature Request]: Show files while browsing for a folder

[peteGSX]

Problem/idea statement

An issue that was confusing during a support ticket was the fact that browsing for existing configuration files only shows folders, not the files themselves. It would be much clearer for users if the files in the folder are shown as well.

Alternatives or workarounds

Need to review in Windows Explorer or File Manager etc. to validate the folder contains the right files.

Additional context

The tkinter "askdirectory()" function does not show files, the workaround would need to be browsing for files and selecting "config.h" or similar, and then use "os.path.dirname()" to obtain the folder name.