Variability: Provide inspector-editor for FeatureAttributeAssignment #1563
Description
In the standard editor for variant configurations, the assignment editor for an attribute is shown in the inspector of the InlineFeatureConfigurationContent concept, i.e., in the inspector for the feature configuration which owns the feature attribute. In this case, the assignment editor (of concept FeatureAttributeAssignment) is not shown in the normal editor, just in the inspector of another cell.
However, there are editors which contain representations of FeatureAttributeAssignment nodes, e.g., the configuration matrix with support for attribute values. In a single cell of the matrix editor, some read-only representation of the FeatureAttributeAssignment node is shown, but the full editor should be provided in the inspector.
Thus, the editor definition of FeatureAttributeAssignment should provide an inspector editor to allow this. In the normal variant configuration editor, this will not have any impact.
Note: Normally it should be possible to implement an additional editor for the inspector controlled by a context hint, but this does not work for editor cells which are in a de.slisson.mps.tables gridquery. Here, always the standard inspector for a concept is shown.