Hi,
I don’t think that this is built-in.
In general the workspace module is one of our weak spots currently and we want to initiate a major rework soon that will also be forward-compatible with the event sourced CR (see Weekly ESCR Talk - #6 by bwaidelich).
But this is not an easy task and it will require time and resources.
In the meantime you could just extend/replace the templates yourself (to add a javascript driven sorting) – and/or the controller (for a PHP based sorting).