Please, have a look at the diagram overview:



To make this diagram I used LayeredLayout class. Please, look at the red-marked area in the bottom. The arrow turns up while it seems to be not necessary - there is only one child node. There are other such arrows on the diagram. Obviously it was made to keep a space. But it makes the diagram messy. I would like to keep arrows horizontal when it's possible. Is there a way to  do this? I've already tried nearly all settings of LayeredLayout but didn't succeed.

Btw, I have another question. Note the gray root node. It's gray because it is actually a ControlHost. It would be nice to show at least the node's fill color if displaying control's contents is impossible.

Thanks,
Artem