Bug 145724 Change version after auto convert
By the request of 136536, user get warning message to confirm the auto convert. If user select yes, the file convert to newest format, but the version is still old. If user open this file again, he'll get the warning message even the file converted.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/ModelUtil.java
if ( encoding != null && !UnicodeUtil.SIGNATURE_UTF_8.equals( encoding ) )
		{
			Exception cause = new DesignParserException(
					DesignParserException.DESIGN_EXCEPTION_UNSUPPORTED_ENCODING );
			Exception fileException = new DesignFileException( fileName, cause );
			throw new SAXException( fileException );
		}
		return encoding;
	}
	/**
	 * 
	 * Performs property name sorting on a list of properties. Properties
	 * returned are sorted by their (locale-specific) display name. The name for
	 * sorting is assumed to be "groupName.displayName" in which "groupName" is
	 * the localized name of the property group, if any; and "displayName" is
	 * the localized name of the property. That is, properties without groups
	 * sort by their property display names. Properties with groups sort first
	 * by group name within the overall list, then by property name within the
	 * group. Sorting in English ignores case.
	 * <p>
	 * For example, if we have the groups "G" and "R", and the properties
	 * "alpha", "G.beta", "G.sigma", "iota", "R.delta", "R.epsilon" and "theta",
	 * the Properties returned is assumed to be sorted into that order.
	 * 
	 * Sorts a list of <code>PropertyDefn</code> s by there localized name.
	 * Uses <code>Collator</code> to do the comparison, sorting in English
	 * ignores case.
	 * 
	 * @param propDefns
	 *            a list that contains PropertyDefns.