[Mono-osx] UI Events not called

[Tomas Trescak]

Dears

I have just posted a question about NSTableView.WillDisplayCell event 
not called.
But I have found out that NO event is called from this NSTableViewObject 
"ColumnsMoved" ...

Then I tried other objects and the result is same for example on 
SelectionChanged event which is also not called.

So obviously it is ME doing something wrong. but what?
Thank you!

Tomas