I request Mr. Nitin Kamath to introduce the option of Square off all, which is present in Pi, in Kite also.
Yes, multiple/all positions exit is available in Kite 3.0.
As @Srinivas has mentioned these are available on kite 3.0 . Check the following link
Kite 3.0 - beta!.
You are welcome to beta test it and pass on the feedback on a link mentioned in the above post.