Fix Attribute Requirement sorting #8814
                
     Merged
            
            
          
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Fixes #8813
Description of the problem being solved:
Required attributes was not being sorted in the breakdown, but Omni was on it's own. Setting the .source flag fixes this and let's us remove redundant sorting later as it is taken care of within CalcBreakdownControl now #7211.
At least that's the theory. Seems to work, makes sense to me, hope this is right. cross fingers
After screenshot:
Without Omni


With Omni