Steps to reproduce:

• Click "Edit" on a Column of an Output Table in CSV Mapping
• Change any property (like Name, Datatype, ...)
• Click "Cancel"
• Click "Edit" on another Column
• Click "Cancel"
• Click "Edit" once again on the initial Column:
  • Bug: The values that were cancelled are still there
  • OK: These "wrong" values are not saved when another part of the mapping is saved