Various bugfixes, mostly eye diagram related

- Update eye diagram when settings are changed but data is static
- Keep trace on eye diagram visible when random other trace is deleted
- resolve references when duplicating a math trace
- use correct trace output domain in various checks throughout the code

Software/PC_Application/LibreVNA-GUI/Traces/traceplot.cpp

@@ -490,6 +490,7 @@ void TracePlot::mouseMoveEvent(QMouseEvent *event)
         } else {
             cursorLabel->hide();
         }
+        triggerReplot();
     }
     event->accept();
 }