Flow/Full/Proxy port design and there direction

[3fla1416]

Is your feature request related to a problem?

On IBD SysMl diagram, we can only add a proxy port. But then haven't direction.

Describe the solution you'd like

I think we need more flow port for describe the internal flow of our system. And the direction of the flow.
I think the ideal solution is to add at the ends of connector line the port and chose what we need on the property editor.
Property of port :

• Flow, Full or proxy
• In, out, or both
• Chose if we want text around the port

Additional context

We have description of the port here:
https://support.ptc.com/help/modeler/r9.0/en/index.html#page/Integrity_Modeler%2Fsysml%2FSysML_Flow_port.html%23
https://support.ptc.com/help/modeler/r9.0/en/index.html#page/Integrity_Modeler%2Fsysml%2FSysML_full_port.html%23
https://support.ptc.com/help/modeler/r9.0/en/index.html#page/Integrity_Modeler%2Fsysml%2FSysML_proxy_port.html%23