Hi!
I would like to suggest a shortcut for the permission windows. 
It’s a bit boring checking/unchecking every single checkbox, for every kind of permission I want to enable/disable.
An easier way to do that could be a context- menu with some shortcuts like:
-	Check/Uncheck column
-	Check/Uncheck row
-	Check/Uncheck all
What you think about it?
Riccardo