RFT segment plot adjustments (#9912)

* Delete RFT plot when associated case is deleted
* Rename
* Hide track/curves with no data

ApplicationLibCode/ProjectDataModel/RimDepthTrackPlot.h

@@ -172,6 +172,8 @@ public:
     static RiuPlotAxis valueAxis( RiaDefines::Orientation depthOrientation );
     static RiuPlotAxis annotationAxis( RiaDefines::Orientation depthOrientation );
 
+    void updateTrackVisibility();
+
 protected:
     QImage snapshotWindowContent() override;