Closes #2950

...ketchat-authorization/server/methods/addUserToRole.coffee

...at-authorization/server/methods/removeUserFromRole.coffee

...s/rocketchat-authorization/server/methods/saveRole.coffee

packages/rocketchat-lib/i18n/en.i18n.json

packages/rocketchat-lib/server/startup/settings.coffee

packages/rocketchat-ui-message/message/message.coffee

server/methods/addRoomModerator.coffee

server/methods/addRoomOwner.coffee

server/methods/removeRoomModerator.coffee

server/methods/removeRoomOwner.coffee