1. Shrink browser window down to 1024x768 or similar.
2. Go to Control Panel -> Message Boards
3. Add a Category.
4. Go to the Permissions for the Category.
Result: Note that due to the small window size, there is a horizontal scoll bar. If you scroll it, the text moves, but the top dock bar leaves a gap.
Attached screenshot show the gap in the upper right, while the permissions panel is scrolled over.