code: function $cleanDragFix() {
          if ($tmpWinMouseMoveListener !== null      &&
              $pointerPressedEvents.hasOwnProperty(LMOUSE) === false &&
              $pointerPressedEvents.hasOwnProperty(RMOUSE) === false   )
          {
              window.removeEventListener("mousemove", $tmpWinMouseMoveListener, true);
              $tmpWinMouseMoveListener = null;
              return true;
          }
          return false;
      }
docs: !!! global mouse move events handler (registered by drag out a canvas surface) has to be removed every time a mouse button released with the given function