Can You Flip Walls?

With the new building (which is awesome so far) when you place a block, you have an option to turn it into a wall and then choose which way it faces (so it disappears correctly when in sliced building view). Is there a way to do this with walls built with the wall tool? I was building a wall around town but must of flipped the way I was looking half way through so only half the wall disappears now…


If not, are there plans for this to be an option in the future?