Shoutbox

You almost got my vote for this...

Although after a quick thought I see a small problem:

This panel is more meant for giving a hint in which commands start with a certain letter. I think it is less meant for showing what commands are available as a whole (for that you have the menus).

This means that if you previously selected to only see the script commands, and you start to type a build-in Plus! command, what should the window do? Show you an empty panel (because you didn't entered a script command) - which goes against the purpose of this window? Or ignore the previous selection and still show you all the available commands starting with the letters you've just typed?

In the latter case, the buttons would be useless, since the window will ignore them anyways...

In the first case the panel would be empty, as if such command doesn't exists. Personally I don't like that though, but that's just me.

So the only usefull thing I see about this is to show you a list of commands in one particualr category when you didn't entered a first letter after the slash. (which is also what the menus are for)... Since as soon as you start to type letters, all the commands of all the categories should be shown again.

It wouldn't be bad, but it wouldn't be very usefull either. Except for seeing all the available script commands under eachother, I don't see much use in this since you have the menus which list all the commands per categorie.