Allow non-sensitive config options to be changed by the Manage Server permission

[triphora]

It doesn't make sense to require administrator perms for a lot of the config options (or really any of them). Almost all of GiselleBot's options can be configured by a server manager, and that is the permission gate for most of Discord's options, like changing the server name or icon. It doesn't make too much sense that a server manager can change the server name and icon but not where messages are logged, for example.