Changeset 3903 for trunk/sources/HeuristicLab.Operators.Programmable/3.3/Properties

Incorporate changes suggested by abeham in 842#comment:28 (#842)

• Fix persistence of selected assemblies
• Fix problem with static initialization
• Make parameter values (ActualValue) with parameter object
• show (or hide) parameter namespaces as necessary
• add icons for buttons, assemblies and namespaces
• sort assemblies and namespaces alphabetically
• correctly mark and unmark select assemblies
• put assemblies and namespaces into group boxes