MultiPlot: Fix small empty legend when toggling legend position.

ApplicationLibCode/UserInterface/RiuMultiPlotPage.cpp

@@ -605,6 +605,7 @@ void RiuMultiPlotPage::performUpdate( RiaDefines::MultiPlotPageUpdateType whatTo
         reinsertPlotWidgets();
         alignCanvasTops();
         if ( m_autoAlignAxes ) alignAxes();
+        updatePlotLayouts();
         return;
     }
 
@@ -643,6 +644,16 @@ void RiuMultiPlotPage::refreshLegends()
     }
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RiuMultiPlotPage::updatePlotLayouts()
+{
+    QList<QPointer<RiuPlotWidget>> plotWidgets = this->visiblePlotWidgets();
+    for ( auto p : plotWidgets )
+        p->updateLayout();
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------

ApplicationLibCode/UserInterface/RiuMultiPlotPage.h

@@ -123,6 +123,7 @@ protected:
 
     virtual void reinsertPlotWidgets();
     virtual void refreshLegends();
+    void         updatePlotLayouts();
 
     void addLegendWidget( RiuPlotWidget*            plotWidget,
                           RiuQwtPlotLegend*         legend,