Fix the auto save function to always include the date and time before the extension

Fix the auto save function to always include the date and time before the extension.
 
This will mean I do not have to save, or save-as.
 
SAVE is destructive. It deletes the previous SAVEd file. Destruction should always require confirmation.
 
Currently the auto-save function is also destructive: it deletes the previous auto save file.  Nicht Gut!
 
I do understand my suggestion changes a bunch of other issues. Such as how bounce-to-tracks files are named.
 
This is partly resolved by fixing the bounce-to-tracks dialog to provide a way to name the track/file with the default to be the current project name,...