Bug 152828 Add the projectFolder property on module
When user doesn't set the resource folder path in designer, there should be a default working path for Birt to manage the report design and find the related resources. A new property should be added on Module: name: projectFolder type:URL This property only can be given from the open design method from session but should not be set after the module initialized. Concern about the backward compatiblity issue, a new method will be added. Open design with a config argument.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* return list is sorted by on the display name of the parameters.
	 * 
	 * @return the sorted, flatten parameters and parameter groups.
	 */
	public List getFlattenParameters( )
	{
		ArrayList list = new ArrayList( );
		SlotHandle slotHandle = getParameters( );
		Iterator it = slotHandle.iterator( );
		while ( it.hasNext( ) )
		{
			DesignElementHandle h = (DesignElementHandle) it.next( );
			list.add( h );
			if ( h instanceof ParameterGroupHandle )
			{
				addParameters( list, (ParameterGroupHandle) h );
			}
		}
		DesignElementHandle.doSort( list );
		return list;
	}
	/**
	 * Returns an external file that provides help information for the report.
	 * 
	 * @return the name of an external file
	 */
	public String getHelpGuide( )
	{
		return getStringProperty( HELP_GUIDE_PROP );
	}