GUI management of expandable connectors

[massimo ceraolo]

With OMEdit r24023 it seems to me impossible to graphically connect an expandable connector.
This is a strong limitation since expandable connectors are very widely used in Modelica, especially in graphical environments.

It is not necessary to have, as a first implementation, too sophisticated behaviour. It would be enough to have the chance of making block-to-connector connection, while defining the signal name inside the connector for that connection. It could be, in this first implementation, an user burden to keep trace of all the names that the connector is requested to manage.

[Adeel Asghar]

#1900