GUAC-1193: Include connection identifier within history records.

guacamole/src/main/webapp/app/rest/types/ConnectionHistoryEntry.js

@@ -41,6 +41,13 @@ angular.module('rest').factory('ConnectionHistoryEntry', [function defineConnect
         // Use empty object by default
         template = template || {};
 
+        /**
+         * The identifier of the connection associated with this history entry.
+         *
+         * @type String
+         */
+        this.connectionIdentifier = template.connectionIdentifier;
+
         /**
          * The time that usage began, in seconds since 1970-01-01 00:00:00 UTC.
          *