Marking for build

If you are placing a blueprint or building something, currently, if a tree is in the way it prevents you from placing the item down. Instead it should allow you to place the "ghost", as if you were using the planning tool, but mark the impediment for removal. This would mean that the tree(s) are marked for priority harvesting. A more technically complex undertaking could also mark terrain for leveling as well. The building would remain in a locked planning mode until the impediment is taken care of, at which point if you don't have the build paused, it would automatically start making resource requests and building. (it could also already have the resources on-hand, but wait to start constructing until the impediment is gone.