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
if ( value == null )
					{
						if ( ExpressionUtil.hasAggregation( handle.getExpression( ) )
								&& groupType != DEUtil.TYPE_GROUP_NONE )
						{
							text = ALL;
						}
						else
							text = NONE_AGGREGATEON;
					}
					else
					{
						if ( groupType == DEUtil.TYPE_GROUP_NONE )
						{
							text = NONE_AGGREGATEON;
							handle.setAggregateOn( null );
						}
						else
							text = value;
					}
					break;
			}
			if ( text == null )
			{
				text = ""; 
			}
			return text;
		}
		public void addListener( ILabelProviderListener listener )
		{