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
}
		return isNewPageValid;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.forms.editor.FormEditor#editorDirtyStateChanged()
	 */
	public void editorDirtyStateChanged( )
	{
		super.editorDirtyStateChanged( );
		markPageStale( );
	}
	private void markPageStale( )
	{
		
		IFormPage currentPage = getActivePageInstance( );
		if ( !( currentPage instanceof IReportEditorPage ) )
		{
			return;
		}