Use a single data attribute message for the message items

There were a set of data attributes with each message item, make it
a single data attribute - message. Pass that to the message editor too.

This is to clean up the passing of message related data.

Change-Id: Ie7aeab2b1b7463c9758443ca7131608c132400ac
Pass the current state of message to update the statsbar correctly

Change-Id: I86ba79b6c6fcb4d37133ac07cea099d16d7e6080