Description:
Steps to reproduce:
 - create a new Orch project
 - open BPEL file in designer
 - open custom editor for the process
 - select Variables tab
 - click Add to add new variable. Create new Variable dialog will open
 - click ... button to open Type Chooser dialog (you can use other steps to open
this dialog)
 - type something in the Type field. The OK button will still be disabled
 - try to select a simple type to Enable the OK button
 - change value in the Type field and press OK. Your modifications will not be
saved, simple type will be used.
This is either a bug with field type functionality or the field should be made
readonly.

Evaluation:
Ok, we need to review the expected functionality here. Assigning to self so i
don't forget.