Bug 157744 [Regression]GUI has memory leak
Causes by 153732, designer has a regression to hold the report design handle in a hashmap. That causes the report design can not be released.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/editparts/TableEditPart.java
ReportComponentEditPolicy policy = new ReportComponentEditPolicy( ) {
				protected org.eclipse.gef.commands.Command createDeleteCommand(
						GroupRequest deleteRequest )
				{
					DeleteColumnCommand command = new DeleteColumnCommand( getModel( ) );
					return command;
				}
			};
			installEditPolicy( EditPolicy.COMPONENT_ROLE, policy );
		}
		public int getColumnNumber( )
		{
			ColumnHandleAdapter adapt = HandleAdapterFactory.getInstance( )
					.getColumnHandleAdapter( getModel( ) );
			if ( adapt.getTableParent( ) == null )
			{
				return -1;
			}
			return adapt.getColumnNumber( );
		}
	}
	/**
	 * The class use for select row in table.
	 * 
	 */
	public static class DummyRowEditPart extends DummyEditpart
	{
		/**
		 * @param model
		 */