When manipulating widget toolbar and attribute editor, it is sometimes a bit annoying to have to use the scrollbar to reach the bottom section which has disappeared when many other sections have been "unfolded".
For the attribubte editor, I suggest using a binding with "mouse enter" trigger to unfold the overflown section and automatically close all others.
For the widget toolbar, "mouse enter" binding looks unpractical. I suggest using the ButtonPressed behaviour instead of the "mouse enter" event.
All this makes vTcl more friendly with low resolutions.
Note : My soon to be submitted patch holds these enhancements.