Make plotZoomed a RiuQwtPlotWidget signal and not just in a couple of sub classes

ApplicationCode/UserInterface/RiuGridCrossQwtPlot.h

@@ -61,9 +61,6 @@ public:
     void setLegendFontSize( int fontSize );
     void setInternalQwtLegendVisible( bool visible );
 
-signals:
-    void plotZoomed();
-
 protected:
     void contextMenuEvent( QContextMenuEvent* ) override;
 

ApplicationCode/UserInterface/RiuQwtPlotWidget.h

@@ -143,6 +143,7 @@ signals:
     void plotItemSelected( QwtPlotItem* plotItem, bool toggleSelection, int sampleIndex );
     void onKeyPressEvent( QKeyEvent* event );
     void onWheelEvent( QWheelEvent* event );
+    void plotZoomed();
 
 protected:
     bool eventFilter( QObject* watched, QEvent* event ) override;

ApplicationCode/UserInterface/RiuSummaryQwtPlot.h

@@ -54,9 +54,6 @@ public:
     void useTimeBasedTimeAxis();
     void setAxisIsLogarithmic( QwtPlot::Axis axis, bool logarithmic );
 
-signals:
-    void plotZoomed();
-
 protected:
     void contextMenuEvent( QContextMenuEvent* ) override;
     void setDefaults();