Added floating field to _tree_reply in ipc documentation
Added floating field to _tree_reply in ipc documentation

Airblader/i3,i3/i3,Airblader/i3-original,Airblader/i3-original,Airblader/i3-original,stapelberg/i3,stapelberg/i3,i3/i3,stapelberg/i3,Airblader/i3-original,stapelberg/i3,Airblader/i3,Airblader/i3-original,i3/i3,Airblader/i3,i3/i3,Airblader/i3