swap two workspaces

[edgimar]

In another tiling WM, I regularly used a "swap with workspace" command that allowed swapping the currently active workspace with some other workspace. Swapping essentially means moving all of the contents (and layout) of the current workspace to the other, and vice-versa. This makes is possible to bring one workspace's contents "near" to other workspaces so that you can easily switch between them using 'workspace prev' and 'workspace next'.