Bug 122869 Drag a parameter from data explorer view into a table in library, a new parameter is created automatically.
Description:Drag a parameter from data explorer view into a table in library, a new parameter is created automatically. Steps to reproduce: 1. Add a cascading parameter and a table in a library file. 2. Drag a parameter from data explorer view into a table cell in layout editor. 3. Find that a new parameter was added in data explorer view automatically.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
* calculate the actual size according to its parent.
	 * 
	 * @param handle
	 *            The style handle to work with the style properties of this
	 *            element.
	 * @return The font size string value.
	 */
	public static String getFontSize( DesignElementHandle handle )
	{
		if ( !( handle instanceof ReportItemHandle ) )
		{
			if ( handle instanceof ModuleHandle )
			{
				return DesignChoiceConstants.FONT_SIZE_MEDIUM;
			}
			if ( handle instanceof GroupHandle )
			{
				handle = handle.getContainer( );
			}
		}
		Object fontSizeValue = getModelFontSize( handle );
		if ( fontSizeValue instanceof DimensionValue )
		{
			return ( (DimensionValue) fontSizeValue ).toString( );
		}
		else if ( fontSizeValue instanceof String )
		{
			String fontSize = (String) fontSizeValue;
			if ( fontSize.equals( DesignChoiceConstants.FONT_SIZE_LARGER ) )
			{