Adds sticky field to get_tree reply in ipc doc
Adds sticky field to get_tree reply in ipc doc

stapelberg/i3,stapelberg/i3,i3/i3,Airblader/i3,stapelberg/i3,Airblader/i3,i3/i3,stapelberg/i3,Airblader/i3,Airblader/i3,i3/i3,i3/i3