Bug 142673 Support UI preference to limit report preview max rows
UI will add a new preference to limit report preview max rows, and viewer should support it when preview report in designer.
viewer/org.eclipse.birt.report.viewer/src/org/eclipse/birt/report/viewer/utilities/WebViewer.java
/**
	 * Preference key for master page content flag.
	 */
	final public static String MASTER_PAGE_CONTENT = "master_page_content"; 
	/**
	 * locale mapping. Save some time.
	 */
	public static TreeMap LocaleTable = null;
	static
	{
		
		LocaleTable = new TreeMap( );
		Locale[] locales = Locale.getAvailableLocales( );
		if ( locales != null )
		{
			for ( int i = 0; i < locales.length; i++ )
			{
				Locale locale = locales[i];
				if ( locale != null )
				{
					LocaleTable.put( locale.getDisplayName( ), locale
							.getLanguage( )
							+ "_" + locale.getCountry( ) ); 
				}
			}
		}
	}
	/**
	 * Get web viewer base url.
	 *