Attribute/entity modification is not saved when switch between JTrees

[blackmonkey]

When switch focus between attributes/entities tree views, the attribute/entity modification is not saved.

Reproduce steps

1. create a new attribute/entity
2. create a new entity/attribute
3. change Chinese/English name of the new entity/attribute
4. click on the new attribute/entity

Reproduce result

The changed Chinese/English name is not saved after click on the attribute/entity.