Chat function in game

Hello! me and my freind played heroes of the storm some days ago and noticed when you are writing in the chat, if you move your mouse or something happens the chat dissapears and u can keep on playing. So it basically a good thing so you dont get caught only becasue u want to write something to the team. When u later open the chat again, the thing u wrote is still there so you dont have to rewrite it! I think this is a very good idea i hope you do as well! :D