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)

<?xml version="1.0" encoding="UTF-8" ?>
<datacage>
    <user>SA</user>
    <password></password>
    <url>jdbc:h2:${artifacts.config.dir}/../datacagedb/datacage</url>
</datacage>