Disable X on sliding side bar

CEP1041

Hello ! When connecting to a Remote Computer, this side bar pops-out. The local user on the remote computer can click X to cancel the inconming remote control tech. How can the X be disabled ?

mLipok

I agree that the X button should be only near to the contact, and not for the entire window.
This is because my clients very often close the connection just after they give me a password.