resolve an issue with mm-sync where endpoint was not passed to the behavior init

Author: Dan Lasky

src/shared/js/sync.html

@@ -216,6 +216,10 @@
 			data:{
 				notify:true
 			},
+			endpoint:{
+				type:String,
+				notify:true
+			},
 			saveResponse:{
 				type:Boolean,
 				value:true