Bug 135497 Data Type is not correct when "Generate All" for Data item
Description: Create a sample datasource and dataset. Insert a data into layout, bind with the dataset.Click "Generate All" to get the Data Binding columns, but the displayed data type is not consistent with the actual one.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/palette/BasePaletteFactory.java
{
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.designer.internal.ui.editors.schematic.tools.AbstractToolHandleExtends#preHandleMouseDown()
		 */
		private static final String DEFAULT_AUTHOR = Messages.getString( "TextExtendsTools.Message.DefaultAuthor" ); 		
		public boolean preHandleMouseUp( )
		{
			String type = (String) getRequest( ).getNewObjectType( );
			String text = null;
			ModuleHandle reportHandle = SessionHandleAdapter.getInstance( )
					.getReportDesignHandle( );
			
			 )
			
			
			
			TextItemHandle textItemHandle = DesignElementFactory.getInstance( )
					.newTextItem( null );
			try
			{
				if ( IReportElementConstants.AUTOTEXT_PAGE.equalsIgnoreCase( type ) )
				{
					text = AUTOTEXT_LABEL_PAGE
							+ "<value-of>pageNumber</value-of>"; 
					textItemHandle.setContentType( DesignChoiceConstants.TEXT_CONTENT_TYPE_HTML );
				}
				else if ( IReportElementConstants.AUTOTEXT_DATE.equalsIgnoreCase( type ) )