I hate to be the bearer of bad news, but this feature request has been declined.
-WarrenJ. Bennink supported this idea ·J. Bennink commented
We'll that's nice....NOT. So the first two tabs (Files and OneNote) will always be taken up for options I don't (always) need. And also why can't we have a feature to get rid of the OneNote tab when new channels don't have it by default anyway. Even a hack to get rid of the tab would be fine. I would hate to need to drop all my "legacy" channels and recreate them just to get rid of a silly unwanted tab