Made some progress. One I needed to make the container which
is a Panel set to absolute positioning. Then set the Button
(prototyping component) visible false. Then I decided to use the
creationComplete handler to position the Button in the bottom right
corner of the tree. Then I used the Tree mouseOver event to show
the Button. The Button click then opens the Menu also positioned to
the right but under. The tree.
Still working on it and will post any updates. Still any
input is appreciated.