https://forums.smartclient.com/forum/smart-gwt-technical-q-a/31413-databound-listgrid-grouping-setshowrecordcomponents-creates-extra-whitespace?view=thread
Databound ListGrid + grouping + setShowRecordComponents creates extra whitespace - SmartClient...
Developing applications with Smart GWT, the Google Web Toolkit edition of SmartClient
groupingcreatesextrawhitespacesmartclient