Bug 135252 [Regression]Focus will lost when switching to script view
Steps to reproduce: 1.Select a data set 2.Click "Script" tab Expected result: Script view for the data set shows up Actual result: The focus on data set lost
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
if ( !prePageChanges( oldPage, newPage ) )
			{
				super.setActivePage( oldPageIndex );
				updateRelatedViews( );
				return;
			}
		}
		else
		{
			super.pageChange( newPageIndex );
		}
		updateRelatedViews( );
		bingdingKey( newPageIndex );
	}
	
	
	
	
	private void bingdingKey( int newPageIndex )
	{
		final IKeyBindingService service = getSite( ).getKeyBindingService( );
		final IEditorPart editor = (IEditorPart) pages.get( newPageIndex );
		if ( editor != null && editor.getEditorSite( ) != null )
		{
			editor.setFocus( );
			
			if ( service instanceof INestableKeyBindingService )
			{
				final INestableKeyBindingService nestableService = (INestableKeyBindingService) service;