Bug 144378 There is no checkbox for user to bind a dynamic image
Description: Create a dynamic image, there is no checkbox for user to bind the column of dataset. Steps to reproduce: 1.Create a sample datasource and dataset with "select * from CLASSICMODELS.PRODUCTLINES". 2.Add a image to the report layout, select dynamic image type, and then click "Binding" button, select the dataset, and want to bind a column. But there is no checkbox for user to do this action. Expected result: Like data item, there is a checkbox for user to bind the column.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ColumnBindingDialog.java
BindingExpressionProvider provider = new BindingExpressionProvider( column.getElementHandle( ) );
							provider.addFilter( new ComputedColumnExpressionFilter( bindingTable ) );
							expressionCellEditor.setExpressionProvider( provider );
						}
					}
				}
				updateButtons( );
			}
		} );
		btnAdd = new Button( contentComposite, SWT.PUSH );
		btnAdd.setText( MSG_ADD );
		GridData data = new GridData( );
		data.widthHint = Math.max( 60, btnAdd.computeSize( SWT.DEFAULT,
				SWT.DEFAULT,
				true ).x );
		btnAdd.setLayoutData( data );
		btnAdd.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				handleAddEvent( );
				refreshBindingTable( );
				if ( table.getItemCount( ) > 0 )
					selectIndex = ( table.getItemCount( ) - 1 );
				updateButtons( );
			}
		} );
		btnEdit = new Button( contentComposite, SWT.PUSH );
		btnEdit.setText( MSG_EDIT );
		data = new GridData( );
		data.widthHint = Math.max( 60, btnEdit.computeSize( SWT.DEFAULT,