Allow any kind of file extension

[Maruchero]

The problem

I've got some parquet files that don't have any extension. I would like to open those files through Edit > Import or just by dragging and dropping, but I can't and I have to rename them adding .parquet at the end of their names.

Proposed solution

• In the file picker window add an option that accepts all kind of files
• When a file gets dropped on the window, pandasgui tries to open it as a known file type, if it fails it shows a message saying like: 'Unsupported file format'