Pre-release V4.0.e, right-click menu to update proxy ports and associated interface blocks

This release is the first with a helper that can update proxy ports and associated interface blocks (including setting direction tags) by right-clicking on a sequence diagram. Intent was to make logical architectural design with proxy ports easier to do.

This is the change log:
#317 08-JUL-2021: ExecutableMBSE: Initial checkpoint of sequence diagram helper for realizing interface blocks (F.J.Chadburn)
#318 08-JUL-2021: SysMLHelper: Update menus so that it's possible to setup project properties (F.J.Chadburn)
#319 09-JUL-2021: ExecutableMBSE: Clean up unnecessary model remnants when initially setting up model properties (F.J.Chadburn)
#320 09-JUL-2021: ExecutableMBSE: Initial implementation of proxy port creation automation when drawing connectors (F.J.Chadburn)
#321 09-JUL-2021: ExecutableMBSE: Added 'Update Ports and Interfaces' to the right-click menu for sequence diagrams and messages (F.J.Chadburn)
#322 09-JUL-2021: ExecutableMBSE: Changed automatic SD creation to use classifier rather than part, if there's only one instance (F.J.Chadburn)
#323 11-JUL-2021: ExecutableMBSE: Update version numbering to 4.0.e (F.J.Chadburn)

I chose not push this release to Github though, rather keep it for select customers I'm working with while it gets developed.