Add conditional value option to DGN-styler for option 'Cell Name'

I would like to see a conditional value option for 'Cell Name' in the DGN-styler.

A conditional value is already possible in the color and lines option. However not with Cell Name. This would be useful; if how have multiple points with a different symbol. 

Now you can define one symbol through the DGN-Styler and the other symbols you can define with the condition-value in another transformer (for instance the AttributeManager) by changing the attribute igds_cell_name.