Bug 120218 Right click menu option to apply theme.
We should support the following right click menu. -- User right clicks int he report design layout area. -- The following menu items needs to be supported Theme --> Apply Theme -->Theme1 -->Theme2 ( similar to Apply style menu option )
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
}
		return 10;
	}
	/**
	 * Get the handle's font size 's string value. if the font size is relative,
	 * 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( );
		}