title: set null for total line with IgnoreUnrelatedimensions
body: <p>Suppose, a measure group doesn't have any relation with Product dimension. We can easily make the report understandable by setting IgnoreUnrelatedDimensions = FALSE. But Total line is still showing the sum value. Is there any way so that i can set null for Total line too? I don't want to set the IsAggregatable = False of Product dimension as I need it for other measure groups. Any help?</p>
  
  <p>Note: I want to have this effect in TOTAL line of any attribute of that dimension. Is there any generic way to do this?</p>
  
  <p>Thanks in advance.</p>