Optional field values are not shown

[dhdaines]

In the entry dialog box, we show the names of the optional fields but not the actual values:

      <ion-item *ngFor="let item of entry.optional | keyvalue">
        <ion-label>{{ item.key }}</ion-label>
      </ion-item>

Also, it would be nice if they came out in the order they're listed in the manifest instead of the arbitrary ordering of object fields.