Membership communication + wpmudev-updates notification = id conflict

Hi,

I just noticed an id conflict between Membership communication and wpmudev-updates notification.

Membership communication use a wysiwyg with the id "message" and when wpmudev-updates have notifications they are in a div with the id "message". So it make the wysiwyg appear on the notification and not the communication message.

I changed the wpmudev-updates notifications div id to solve it.

thank you