added icon for kinematic unit gui plugin

source/RobotAPI/gui_plugins/KinematicUnitPlugin/KinematicUnitGuiPlugin.h

@@ -152,10 +152,9 @@ namespace armarx
         virtual void onExitComponent();
 
         // inherited of ArmarXWidget
-        virtual QString getWidgetName() const
-        {
-            return "RobotControl.KinematicUnitGUI";
-        }
+        virtual QString getWidgetName() const { return "RobotControl.KinematicUnitGUI"; }
+        virtual QIcon getWidgetIcon() const { return QIcon("://icons/kinematic_icon.svg"); }
+
         QPointer<QDialog> getConfigDialog(QWidget* parent = 0);
         virtual void loadSettings(QSettings * settings);
         virtual void saveSettings(QSettings * settings);