RelationshipAddDialog Constructor
        
 Initializes the RelationshipAddDialog. Called during construction.
 
         
        Parameters
        
            - fileSystemEntry
            
 
            - 
                
Type: dundas.filesystem.FileSystemEntry
The file system entry that this dialog is for. This must be a dundas.data.Structure. This is the source structure for the relationship. 
            - relationship
            
 
            - 
                
Type: dundas.data.Relationship
(optional) The relationship this is for. If not supplied, it's assumed to be a new one.
Optional: True