Bug 390669 [Accessibility]Press 'Tab' doesn't focus on the next report item when adding relative period aggregation.
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/dialogs/CrosstabBindingDialogHelper.java
e.detail = SWT.TRAVERSE_NONE;
					if ( btnDisplayNameID.isEnabled( ) )
					{
						openKeySelectionDialog( );
					}
				}
			}
		} );
		txtDisplayNameID = new Text( composite, SWT.BORDER | SWT.READ_ONLY );
		txtDisplayNameID.addModifyListener( new ModifyListener( ) {
			public void modifyText( ModifyEvent e )
			{
				modifyDialogContent( );
				validate( );
			}
		} );
		txtDisplayNameID.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		btnDisplayNameID = new Button( composite, SWT.NONE );
		btnDisplayNameID.setEnabled( getAvailableResourceUrls( ) != null
				&& getAvailableResourceUrls( ).length > 0 ? true : false );
		btnDisplayNameID.setText( "..." ); 
		btnDisplayNameID.setToolTipText( Messages.getString( "ResourceKeyDescriptor.button.browse.tooltip" ) ); 
		btnDisplayNameID.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent event )
			{
				openKeySelectionDialog( );
			}
		} );
		btnRemoveDisplayNameID = new Button( composite, SWT.NONE );
		btnRemoveDisplayNameID.setImage( ReportPlatformUIImages.getImage( ISharedImages.IMG_TOOL_DELETE ) );