Click on Tree Node with no children gives "Expanding" event

[mkromberg]

Run DemoTreeView. Open "Q1", then "Jan", then "In". The third Expanding on node 3 should not be sent. It is followed by the correct ItemDown event.

23:46.393 T: #6: {"WS":{"ID":"F1.Average","Properties":{"Caption":"Expanding on node #1"}}} HTTP Request for C:/devt/jswc/demo/images/Folder-Open.png 23:47.327 R: #6: {"Event":{"EventName":"Expanding","ID":"F1.Months","Info":2}} 23:47.333 T: #6: {"WS":{"ID":"F1.Months","Properties":{"ImageIndex":[2,2,3,3,1,3,3,1,3,3,1,1,3,3,1,3,3,1,3,3]}}} 23:47.336 T: #6: {"WS":{"ID":"F1.Average","Properties":{"Caption":"Expanding on node #2"}}} HTTP Request for C:/devt/jswc/demo/images/Price-Ticket.png

23:53.457 R: #6: {"Event":{"EventName":"Expanding","ID":"F1.Months","Info":3}} 23:53.487 T: #6: {"WS":{"ID":"F1.Months","Properties":{"ImageIndex":[2,2,2,3,1,3,3,1,3,3,1,1,3,3,1,3,3,1,3,3]}}} 23:53.511 T: #6: {"WS":{"ID":"F1.Average","Properties":{"Caption":"Expanding on node #3"}}} 23:53.529 R: #6: {"Event":{"EventName":"ItemDown","ID":"F1.Months","Info":[3,1,0,4]}}