NeedResize - bakkeby/dusk GitHub Wiki
If a window is not visible when a configure request to resize or move the window is received then the window will not change size or position.
NeedResize is an internal flag that is set in the above situation and has the effect that the
change in size or position is applied when the window is made visible (e.g. when the workspace the
window belongs to is shown).
The flag is also set automatically when the placemouse feature is used (see MovePlace).
Setting this flag via client rules serves no purpose.