This function downloads the user configuration saved in the local storage as a JSON file.
If there is no saved user configuration in the local storage, it will display an error notification.
Returns void
Remarks
The function assumes the existence of a previously defined downloadConfigurationButton
which should be a reference to an HTML anchor (<a>) element used to trigger the file download.
This function downloads the user configuration saved in the local storage as a JSON file. If there is no saved user configuration in the local storage, it will display an error notification.