StateGroupDetailsDialog Constructor
        
 Initializes the StatesDialog. Called during construction.
 
         
        Parameters
        
            - metricSet
            
 
            - 
                
Type: dundas.entities.MetricSet
The metric set this state group should be set up on (added or updated). 
            - stateGroup
            
 
            - 
                
Type: dundas.data.StateGroup
(optional) If specified, this StateGroup is used as the one to edit. If not specified, it's assumed a new one is being added.
Optional: True 
            - measureUniqueName
            
 
            - 
                
Type: String
(optional) The default measure to use (unique name).
Optional: True