little things to fix

[1v0ry_k1ng]

1) previously when you wrote somthing with a: infront of it in chat, if you then opened chat again it remembered to put a: infront automaticly, now it dosnt

2)previously when you held alt and added somthing to a buildcue, it was moved to the front of the que stopping the current project, now it dosnt

[LordMatt]

- Added some reasonable default keybindings for all/ally/spec chat messaging:
enter -> send to <last send type>
Ctrl+enter -> send to All
Alt+enter -> send to Allies
Shift+enter -> send to Spectators
(Note that the modifier versions can be used to change the send mode ever
while typing the message.)

I think people are holding shift when they hit enter.

[Pendrokar]

Ill add this to wiki!
Edit: Done - http://spring.clan-sy.com/wiki/Using_chat