An exception is thrown when modifying the collected values of a VariableCreator

[abeham]

Steps to reproduce in the Optimizer:

1. Create a new SimulatedAnnealing algorithm
2. Convert it into a UserDefinedAlgorithm
3. In the converted algorithm go to the "Operator Graph" tab
4. Select the operator called "Initialize EvaluatedMoves"
5. Try to remove the parameter "EvaluatedMoves" there
6. Following exception is thrown

System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at HeuristicLab.Operators.Views.GraphVisualization.BidirectionalLookup`2.GetBySecond(TSecond secondValue)
   at HeuristicLab.Operators.Views.GraphVisualization.OperatorGraphVisualizationInfo.Parameters_ItemsRemoved(Object sender, CollectionItemsChangedEventArgs`1 e)
   at HeuristicLab.Collections.CollectionItemsChangedEventHandler`1.Invoke(Object sender, CollectionItemsChangedEventArgs`1 e)
   at HeuristicLab.Collections.ReadOnlyObservableKeyedCollection`2.OnItemsRemoved(IEnumerable`1 items)
   at HeuristicLab.Collections.ReadOnlyObservableKeyedCollection`2.collection_ItemsRemoved(Object sender, CollectionItemsChangedEventArgs`1 e)
   at HeuristicLab.Collections.ObservableKeyedCollection`2.OnItemsRemoved(IEnumerable`1 items)
   at HeuristicLab.Core.NamedItemCollection`1.OnItemsRemoved(IEnumerable`1 items)
   at HeuristicLab.Collections.ObservableKeyedCollection`2.RemoveRange(IEnumerable`1 collection)
   at HeuristicLab.Operators.ValuesCollector.collectedValues_ItemsRemoved(Object sender, CollectionItemsChangedEventArgs`1 e)
   at HeuristicLab.Collections.CollectionItemsChangedEventHandler`1.Invoke(Object sender, CollectionItemsChangedEventArgs`1 e)
   at HeuristicLab.Collections.ObservableKeyedCollection`2.OnItemsRemoved(IEnumerable`1 items)
   at HeuristicLab.Core.NamedItemCollection`1.OnItemsRemoved(IEnumerable`1 items)
   at HeuristicLab.Collections.ObservableKeyedCollection`2.Remove(TItem item)
   at HeuristicLab.Core.Views.ItemCollectionView`1.removeButton_Click(Object sender, EventArgs e)

It works when creating a new UserDefinedAlgorithm from scratch, adding a VariableCreator, adding a collected value and removing that again. Seems like something gets lost, or is not initialized when converting an existing algorithm to a user-defined algorithm.

[abeham]

Not reproducible anymore