Ext designer lost fieldLabel settings while changing fieldSet layout, var 1.2.2 b. 48

[laurbalaur]

Steps to reproduce:
1. Create new Ext 3.3 project
2. Put Form in proj
3. Put FieldSet into form
4. Put one or more fields into fieldset, there are fieldLabels generated by def, you could change it.
5. Then change FieldSet layout from 'form' to 'hbox' and back to 'form'. FieldLabels are null .