`Ctrl + A` to "select all" in file dialog?

I use dpg 2.0.0.

I a general file dialog, we are comfortable with three usually default multi-selection methods: `shift + left click` for continuous selection, `Ctrl + left click` for discontinuous selection, and `Ctrl + A` to select all in the current directory.

In the dpg file dialog that could be implemented by `dpg.file_dialog`, we can do the first two multi-selections by default, but not `Ctrl + A`. I wonder if there is a way to implement the `Ctrl + A`?