Bug 122850 Table/list should not be able to be inserted in Master Page mode.
Description: Table/list should not be able to be inserted in Master Page mode. Steps to reproduce: 1. New a report and transfer to Master Page mode. 2. New a datasource and dataset 3. Drag a list/table to page header/footer, bind it to dataset and drag some columns inside. 4. Save and preview Expected result: Insert list/table item in master page should be forbidden. Actual result: They are allowed and preview showed "undefine" in page
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
*            <ul>
	 *            <li><code>IResourceLocator.IMAGE</code>
	 *            <li><code>IResourceLocator.LIBRARY</code>
	 *            </ul>
	 *            Any invalid value will be treated as
	 *            <code>IResourceLocator.IMAGE</code>.
	 * @return the <code>URL</code> object if the file with
	 *         <code>fileName</code> is found, or null otherwise.
	 */
	public URL findResource( String fileName, int fileType )
	{
		try
		{
			File f = new File( fileName );
			if ( f.isAbsolute( ) )
				return f.exists( ) ? f.toURL( ) : null;
			String base = getStringProperty( this, BASE_PROP );
			if ( base != null )
			{
				f = new File( base, fileName );
				if ( f.exists( ) && f.isFile( ) )
					return f.toURL( );
			}
		}
		catch ( MalformedURLException e )
		{
			return null;
		}
		URL url = getSession( ).getResourceLocator( ).findResource(
				(ModuleHandle) getHandle( this ), fileName, fileType );