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
return false;
			}
			InsertInLayoutUtil.setInitWidth( grid );
			setModel( grid );
			return super.preHandleMouseUp( );
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.designer.internal.ui.editors.schematic.tools.AbstractToolHandleExtends#preHandleMouseDown()
		 */
		public boolean preHandleMouseDown( )
		{
			return false;
		}
	}
	/**
	 * Provides element building support for data set.
	 */
	public static class DataSetToolExtends extends AbstractToolHandleExtends
	{
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.designer.internal.ui.editors.schematic.tools.IToolHandleExtends#preHandleMouseDown()
		 */
		public boolean preHandleMouseUp( )
		{
			if ( getRequest( ).getNewObjectType( ) instanceof DataSetHandle )
			{