Add option to switch workspaces (also backwards) similar to switching windows

I'd prefer to have an option to be able to switch between workspaces similar to how one switches between windows. The logical default choice would be cmd+tab which would cycle between used workspaces, while also showing the multitasking overview while cmd is pressed (just like Plank is used as window overview when the alt key is still pressed after alt+tab'ing).

As I (and probably others) rarerly use more than 3 workspaces, cycling wouldn't be an issue, cmd+tab is much easier to reach than cmd+left/right and seems more intuitive.