- When saving a model to a file, don't require that the model already
has a name entered. Instead, if no model name has been entered then
set the model name automatically to match the selected save filename.
E.g. if the user saves the model as "Process incoming features.model3",
then the model name will be set to "Process incoming features".
- When first saving a model, IF the user HAS already entered a model
name then make the default file name suggested by the dialog match
this model name
