I think there was a MOD that did almost the same thing in phpBB 3.0.x
And it would be very useful to me, and I hope for others to...
But I need something like you see on the image I made.
Admins can wright there if the made any changes to the forum, files etc...
It's good for when you have more admins who have FTP access to some files/folders.
So we always know what they did and when ...
(If they fill in the note)