Only create the GaugeTree and RiverInfoPanel once This fixes resizing issues when changing the river. SmartGWT is not able to recalculate the height and width if a GWT widget is inserted later. Every attempt to call a recalculation manually did fail. Fix for flys/issue925 (W-INFO / Pegel-Info-Modul / Zeile Gewässer-INFOS)

SYMBOLSET
SYMBOL
  NAME 'point'
  TYPE ELLIPSE
  POINTS
    1 1
  END
  FILLED TRUE
END
SYMBOL
  NAME "square"
  TYPE VECTOR
  POINTS
    0 0
    0 1
    1 1
    1 0
    0 0
  END
  FILLED TRUE
END
END