Description of problem:
All editors show the asset name in the header of the panel. This name contains also the file extension. This is an unnecessary information, especially for a business user. We don't show the file extension in the Project Explorer - Business view, this should be consistent with that.

Instead of 'Business Process [evaluation.bpmn2]' and 'Enum Editor [enum.enumeration]', there should be only 'Business Process [evaluation]' and 'Enum Editor [enum]'.