With the polygon, when using pidgin, having the buddy list in the middle of the
screen, 200 px width, full screen high, then opening the manage accounts
window, the decorations of the buddy list were visible on the accounts window.
The implementation works like this:
Containers can have a 'sticky-group' attribute. Imagine two different
containers (on two different workspaces) which have the same sticky-group.
Now you open a window in the first container. When you switch to the
other workspace, the window will be re-assigned to the other container.
An obvious problem which is not covered with the code at the moment is
having two containers with the same sticky-group visible at the same time.
Michael Stapelberg