Hide Settings Tab if Author

Implements #3293. Currently, we don’t have a permission system on the
client side, so this relies on a hardcoded “author” string.
My understanding is that there is currently a limit to 1 Role per User; eventually this limit will be removed, and at that time I figured a permission system would be implemented that is more robust than this code. I asked in IRC, and got the OK for this, but yeah -- it isn't meant to be long-term code