ui: tape/ChangerStatus: add missing model fields

the DiffStore only updates the fiels given in the model, so we have to
list all the fields we depend on, else we have incomplete data,
e.g. for rendering

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

www/tape/ChangerStatus.js

@@ -1,6 +1,6 @@
 Ext.define('pbs-slot-model', {
     extend: 'Ext.data.Model',
-    fields: ['entry-id', 'label-text', 'is-labeled', ' model', 'name', 'vendor', 'serial', 'state',
+    fields: ['entry-id', 'label-text', 'is-labeled', ' model', 'name', 'vendor', 'serial', 'state', 'status', 'pool',
 	{
 	    name: 'is-blocked',
 	    calculate: function(data) {