ENH : add isactive flag to visu handlers

Code/Visualization/otbArrowKeyMoveActionHandler.h

Code/Visualization/otbChangeExtractRegionActionHandler.h

Code/Visualization/otbChangeScaleActionHandler.h

...Visualization/otbChangeScaledExtractRegionActionHandler.h

Code/Visualization/otbImageWidgetActionHandler.h

Code/Visualization/otbImageWidgetController.cxx

Code/Visualization/otbImageWidgetController.h

Code/Visualization/otbMouseClickActionHandler.h

Code/Visualization/otbPixelDescriptionActionHandler.h

Code/Visualization/otbSelectAreaActionHandler.h

Code/Visualization/otbVectorDataActionHandler.h

Code/Visualization/otbWidgetResizingActionHandler.h