Alt Enter (Window Mode)

This combination has killed me some times. While holding alt I want to type a message, so I hit enter and tadah; my game goes into full-screen which takes a rough 10-15 seconds to load, which can mean my death in some cases.

So, is there a way to remove this key combination? I can't find it anywhere in the Control options... Or do I have to put the "Open chat" control on some other key so I won't press to alt enter combination when trying to type? ._.

You could let go of Alt before you type. Or you could remap the "Show Target Allies" button (Alt) to something else?

Other than that, the Alt + Enter combo is universal, it's not just used for Guild Wars.

I know I can let Alt go before typing, but out of quickness I still happen to hold it sometimes. xD
But of course, if there's any way to block this combo, that would be better than moving a key.