The graphics appeared when I viewed the post from the notes client. Not from Xpages. Not sure what the deal is there. I sent a note to IBM.
I've not really looked at the events inside all properties for something like that. My first thought was it was for client side vs server side but I didn't see anything there. I would ignore those I think. The only time I've ever really gone into all properties to manipuate an event is for "onComplete" type stuff I think. You can get into trouble in there if you use the wrong editor. Sometimes you need to type ssjs code not into the editor but into a pure text editor. I forget what's going on there...
Anyway I do use all properties a lot... just not really for any events...