Policy Prop Limit Guidelines

[Divey]

Added new point to the Administrators guidelines:

'If you are making a dupe with another Administrator, you should make it one dupe - rather than extending your own and having another part be 150.'

This is so we can be completely transparent in how big admins dupes are, as sometimes it currently may be misleading as to how many props a dupe actually is, considering the number is broadcast to the entire server.