Actually, it's not a plugin ...
If you go to the character control panel ingame, select the Chat tab, you will see you can direct where you want certain things to go ... for example, I have my magics and combat in chat window #1, which I have "parked" just above the standard chat bar. I have allegiance, fellow, area chat and tells in the main chat window. You can put the global channels into one or more chat windows, and close them down when you do not wish to see them.
Just make sure whatever changes you make are followed by hitting the "apply" button at the bottom of the window, or they'll not be saved.
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