User experience improvement on transformation actions like 'filter'

Changes in transformation actions to take effect before clicking 'OK' button.

Eg:

1. Create transformation

2. select 'Filter' action

3. Add rule under 'Properties' tab

4. switch to 'Outgoing' tab

5. See: outgoing fields are not added unless you click ok and open the filter action again and then goto Outgoing fields' tab

This is true for other transformation actions as well. Eg: Join action