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/api/ModuleHandle.java
* <code>SharedStyleHandle</code> .If any style selected has a duplicate
	 * name with that of one style already existing in the report design, this
	 * method will rename it and then add it to the design.
	 * 
	 * @param stylesheet
	 *            the style sheet handle that contains all the selected styles
	 * @param selectedStyles
	 *            the selected style list
	 * 
	 * 
	 */
	abstract public void importCssStyles( CssStyleSheetHandle stylesheet,
			List selectedStyles );
	/**
	 * Sets the theme to a report.
	 * 
	 * @param themeName
	 *            the name of the theme
	 * @throws SemanticException
	 */
	public void setThemeName( String themeName ) throws SemanticException
	{
		ThemeCommand command = new ThemeCommand( (Module) getElement( ) );
		command.setTheme( themeName );
	}
	/**
	 * Returns the refresh rate when viewing the report.
	 * 
	 * @return the refresh rate
	 */