I'm very surprised this thread hasn't received more "+1" responses. I think this feature should be implemented ASAP. I can't tell you how many times I've had to waste 10-20 minutes painstakingly removing automatically generated supports one at a time, cursing under my breath and thinking, "Why the heck don't they have a feature that makes this easier?!"
That said, I really don't expect the folks at Simplify3D to add this feature because they've never added any feature I've considered important and suggested since I purchased the software several years ago. When I first started using it, I considered Simplify3D to be, by far, the best slicer available, but they've done virtually nothing to improve the software since then.