Description of problem:
If you change a column definition from one field to another, the list of default values stays the same. You have to add something to value list (and optionally erase it again), to see the right default value options.


Version-Release number of selected component (if applicable):
BPMS 6.0 ER3


Steps to Reproduce:
1. Set up a Fact Person with int age and String name.
2. Add a simple Condition: pattern 'Person' with binding 'p', field 'age', operator 'equal to', some header and optional value list with '1,2,3'. 
3. Finish this column.
4. Toggle Condition columns and edit this column: choose field 'name' and some operator.


Actual results:
Optional value list is empty.
Options 1, 2 and 3 are still available in the default value drop down list.


Expected results:
Optional value list is empty.
Default value has a simple input line, empty, not a drop down list of (wrong) options.