Bug 127005 Dynamic drill thru link to book mark
To create a drill thru link to a report document, user has to pre-create book marks in the target report today. But in many cases, the target report could be designed by a different report writer. And that report writer may not know what section of the report others want to link to. We shall not require the target report has pre-created book mark for other reports to link to it. We shall allow link to a report's TOC, and allow link to report based on report item ID + row id (col name, col value) For BIRT 2.1, we only need to add support of drill thru link to tarket report's TOC.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/HyperlinkBuilder.java
if ( isRequired )
		{
			label = REQUIED_MARK + LABEL_BOOKMARK;
		}
		else
		{
			label = LABEL_BOOKMARK;
		}
		new Label( displayArea, SWT.NONE ).setText( label );
		bookmarkChooser = new Combo( displayArea, SWT.BORDER | SWT.READ_ONLY );
		GridData gd = new GridData( GridData.FILL_HORIZONTAL );
		gd.horizontalSpan = 2;
		bookmarkChooser.setLayoutData( gd );
		bookmarkChooser.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				bookmarkEditor.setText( bookmarkChooser.getText( ) );
				updateButtons( );
			}
		} );
		new Label( displayArea, SWT.NONE ).setText( LABEL_LINKED_EXPRESSION );
		bookmarkEditor = new Text( displayArea, SWT.BORDER | SWT.READ_ONLY );
		bookmarkEditor.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		createExpressionButton( displayArea, bookmarkEditor );
	}
	private void createFormatBar( )
	{
		new Label( displayArea, SWT.NONE ).setText( LABEL_FORMAT );
		formatChooser = new Combo( displayArea, SWT.READ_ONLY | SWT.BORDER );
		formatChooser.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );