Hello
I found solution 
I have added in Dial Plan Call center XML 
        <action application="set" data="cc_exit_keys=1"/>
        <action application="bind_digit_action"data="myrealm,1,exec:Lua,lua_script.lua,1"/>
working properly
But after press save key in Call Center Queue on the web page that setting was gone from xml
How can i add row between Exit Key and Description on web page?