When clicking Cancel on the FileChooser save dialog then clicking No (not sure), PulseCaster loses the location and filename

[nekohayo]

When clicking Cancel on the FileChooser save dialog then clicking No (not sure), PulseCaster destroys and recreates the FileChooser, which also means it gets reset to its default location and empty filename. It shouldn't do that, because that means the user's current directory and filename get lost.

Instead it should just dismiss the confirmation dialog and let the user continue with the existing FileChooser dialog.