#12168 Allow highlight of curves based on selection of realization object

Use the first available highlighted curve as basis for display of horizontal readout value. Fallback to single realization curves.
When selecting a realization in project tree, highlight all related curves
Make sure zoom rect works when readout annotations are active

ApplicationLibCode/UserInterface/RiuPlotAnnotationTool.cpp

@@ -20,6 +20,7 @@
 
 #include "RimPlotAxisAnnotation.h"
 #include "RiuGuiTheme.h"
+#include "RiuQwtPlotCurveDefines.h"
 
 #include "cafCategoryMapper.h"
 #include "cvfMath.h"
@@ -408,4 +409,6 @@ void RiuPlotAnnotationTool::setLineProperties( QwtPlotMarker*          line,
         line->setLineStyle( QwtPlotMarker::VLine );
         line->setXValue( linePosition );
     }
+
+    line->setZ( RiuQwtPlotCurveDefines::zDepthForIndex( RiuQwtPlotCurveDefines::ZIndex::Z_ANNOTATION ) );
 }