It would be nice to have the option to collapse individual widgets on the Blackened Pro style. I know you can hide the sidebar already. But would be nice to collapse each one like you can with the forum categories.
After having a quick look this may not be possible from a style stand point, at least in a nice way. Each widget has it's own template so it would require edits to each and ANY new widgets added through the widget system. We may be able to post a guide on how to add it but for now I do not think we can build it into our framework.