* Python: avoid assigning same port number to multiple grpc sessions
* Add retry count when checking for port number file
* Use grpc to find and use port number
* Add test used to start several instances of resinsight at the same time
Testing up to 50 instances works well
* Python: allow launch_port == 0 to assign port by GRPC in Instance.launch().
Also allow longer wait before failing the port number file reading:
it can take some time to launch when launching lots of instances at
the same time.
Use auto value concept in summary plot configuration. Default behavior is unchanged, but it is now possible to unlink a field to specify a custom value for this field.
Other changes:
* Add missing requirement for Svg in test application
* Use calculator icon and rename panel text
Use icon and relevant text to make it clear that the content in Calculator Data can be used for Grid Property Calculator and nothing else.
* Add example with scoped enum and auto value
* Use enum value starting av 10 to make sure enum values (not option item index) are working as expected
