Websocket real time display on pMARCOS working only on retry

[leonro]

When running a MARCOS process with websocket destination enabled then opening the Live Signal page, i.e. localhost:8080, often only shows a blank page with the Real Time Acquisition headline. Opening other tabs with the same page eventually will then open the live view diagrams after some up to 30 seconds, in the new tab. The "error" is not clearly reproducible. Observed in Chromium and Firefox with MARTAS2.0b10 plus earlier.