@param detail One of Above, Below, TopIf, BottomIf, Opposite
@param activate If TRUE, and if the window is going to be raised, it will
be activated instead
- @return false if given TopIf or BottomIf and no action was taken,
- true otherwise
+ @return TRUE if the client was restacked
See http://tronche.com/gui/x/xlib/window/configure.html for details on
how each detail works with and without a sibling.
*/