Update the current set of properties on the server.
The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).
The callback for this method is defined as:
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'err' has 2 properties which hold detailed information:
When the user calls PatchProperties, the class will send a request to the server to update the existing property list. The method is linked to the Properties property: the class will use the Operation field to tell the server what to do with the properties.