fix kill_session_prompt.sh

Script doesn't process non-zero exit codes producing artifact messages on the screen.

Author: dbzix

scripts/kill_session_prompt.sh

@@ -8,5 +8,10 @@ CURRENT_SESSION_ID="$2"
 
 main() {
 	tmux confirm -p "kill-session ${CURRENT_SESSION_NAME}? (y/n)" "run '$CURRENT_DIR/kill_session.sh \'$CURRENT_SESSION_ID''"
+
+ 	if [ $? -ne 0 ]; then
+        	# do nothing
+	return
+	fi
 }
 main