How to order Service operations in alphabetical order in SoapUI project?

Apparently it's not possible. Tested with all versions, even with SoapUI NG Pro.

The only way to find your operation fast is to start typing your operation name. This way it navigates to the operation that starts with the same string as you typed.

SoapUI free version: Preferences -> UI Settings -> Checked: Order Services alphabetically in tree. Then delete and recreate the list of services from WSDL. The new list is sorted alphabetically.

The only way that I've found to order operations is to edit the raw soap-ui project xml. Maybe it's not viable to you, because of the size of your project, but anyway it's an alternative.