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
( (GridData) paramsComposite.getLayoutData( ) ).exclude = false;
				( (GridData) paramsComposite.getLayoutData( ) ).heightHint = SWT.DEFAULT;
				int width = 0;
				if ( paramsComposite.getParent( ).getLayout( ) instanceof GridLayout )
				{
					Control[] controls = paramsComposite.getParent( )
							.getChildren( );
					for ( int i = 0; i < controls.length; i++ )
					{
						if ( controls[i] instanceof Label
								&& ( (GridData) controls[i].getLayoutData( ) ).horizontalSpan == 1 )
						{
							int labelWidth = controls[i].getBounds( ).width
									- controls[i].getBorderWidth( )
									* 2;
							if ( labelWidth > width )
								width = labelWidth;
						}
					}
				}
				for ( final IParameterDefn param : params )
				{
					Label lblParam = new Label( paramsComposite, SWT.NONE );
					lblParam.setText( param.getDisplayName( ) + ":" ); 
					
					
					GridData gd = new GridData( );
					gd.widthHint = lblParam.computeSize( SWT.DEFAULT,
							SWT.DEFAULT ).x;
					if ( gd.widthHint < width )