Editing WS connection properties results in loss of some properties

1. Create a WSDL SOAP connection profile.
2. Right-click on the profile and select properties to display the new connection's properties.
3. Edit a property, eg. change security properties, and click OK.
4. The properties DefaultBinding and EndPointName are not saved and are dropped from the connection profile.

This means the connection profile is now broken and causes NP exceptions when selecting the profile in the WSDL importer.

• Fix the WSDL property editor to avoid dropping properties
• Fix the WSDL importer to report a broken connection profile rather than quietly throwing NP exceptions.