Seperate "Pin Messages" from "Manage Messages" (see description)

Seperating these two permissions, so they can independently be used by a role would be great.
By seperating "Pin Messages" from "Manage Messages" lots of servers could be managed better than now.
However, "Manage Messages" should keep also the permission to pin messages to (as the name already says) manage all kinds of messages, but there should be an extra option called "Pin Messages" in the "Permission" tab.