Edouard Tisserant <edouard.tisserant@gmail.com> [Wed, 30 Jun 2021 15:51:59 +0200] rev 3267
SVGHMI: Prepare accepting multiple clients on multiple HMI: Use POULibrary new capability to add variables to PLC Configuration. Now heartbeat and HMI tree root are added by the library part of SVGHMI, and not by each instance.