I use a ovs (Oject Value Selector) help window and it works fine. There is only one thing which makes it hard to use: The ovs window is positioned under the entryfield for which it provides help. If the Browser Window does not run in fullscreen mode the ovs window maybe positioned to the right, so that part of the ovs window is outside the browser window (although there is enough room to display the whole ovs window in the browser). Even if the initial ovs window position is acceptable, after invalidating the output node the whole ovs window is repositioned to the right(with 60% off the browser window).
We are at the actual patch level (i think).
Can i affect the position of the ovs window, or is the window position algorithm buggy?