Bug 135821 Can't change data binding column when reverting from a template report item to a repot item
Steps to reproduce: 1.New a data with data binding column "a = 'abc'" 2.Select the data and convert it to a template report item 3.Double click the data Expected result: In the pop-up data binding window, a tick box lists on the left Actual result: No tick box on the left(see the screenshot). That means user can't change data binding any more till he reopen the data binding window
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/ElementBuilderFactory.java
{
	static private ElementBuilderFactory instance;
	private ElementBuilderFactory( )
	{
	}
	/**
	 * @return instance of factory.
	 */
	static public ElementBuilderFactory getInstance( )
	{
		if ( instance == null )
		{
			instance = new ElementBuilderFactory( );
		}
		return instance;
	}
	/**
	 * Creates builder for given element
	 * 
	 * @param handle
	 * @return
	 */
	public Object createBuilder( DesignElementHandle handle )
	{