NB: 070830

Steps to repro:
1) Create a class diagram C1, drop a class to the editor
2) From the editor, add 3 attributes via <ctrl><shift>A
3) Add an operation via <ctrl><shift>O
4) From the projects window, expand the Model -> C1 -> Operations
5) Select the operation and <Delete>
6) From the projects window, Select Operations -> New to create another operation 
7) Unamed operation created,  select it and rename it 
8) Select the newly renamed and delete it

   Notice that the operation is still showing in the projects window, but it is deleted
   in the diagram editor.

   There seems to be a refresh issue here in operation creation via the UI immediately followed by
   operation deletion from the projects tree.