Bug 189706 Enhance computed column aggregation function handling in UI.
Due to the issue discussed in 189705, current computed column aggregation builder in data set editor has bugs to extend: 1.When new a computed column, the aggregation argument field cannot be correctly set. 2.The argument field cannot be correct grayed out when user select a aggregation function without arguments 3.The available aggregation function list is incomprehensive 4.Some aggregation function cannot be set to model(say, weightedAve).
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/pass/DataSetProcessUtil.java
helper.getComputedColumnList( )
										.remove( iccState.getComputedColumn( i ) );
								break;
							}
						}
					}
				}
			}
			PassUtil.pass( this.populator,
					new OdiResultSetWrapper( populator.getResultIterator( ) ),
					false,
					this.session );
		}
		computedColumnHelper.getComputedColumnList( ).clear( );
		computedColumnHelper.getComputedColumnList( ).addAll( aggCCList );
		computedColumnHelper.setModel( TransformationConstants.DATA_SET_MODEL );
		iccState.setModel( TransformationConstants.DATA_SET_MODEL );
		
		
		if ( iccState.getCount( ) > 0 )
		{
			ComputedColumnCalculator.populateComputedColumns( this.populator,
					new OdiResultSetWrapper( this.populator.getResultIterator( ) ),
					iccState,
					computedColumnHelper, this.session );
		}
		computedColumnHelper.setModel( TransformationConstants.NONE_MODEL );
	}
}