The TreeView control has a number of styles that are not represented in the createTreeView() method of the UserDialog.
The styles should be updated to include all current TreeView styles.
Committed revision 8580. r implementation.
You seem to have CSS turned off.
Please don't fill out this field.
Committed revision 8596. [r8596] documentation.
This enhancement is available in the ooDialog 4.2.1 release.