Column swaper

**Is your feature request related to a problem? Please describe.**
I use the row block a lot and frequently I'll get done and I'll wish that I would have put the information differently than I did. Sure you can group all the blocks and drag them from one side to another but it's kinda a pain.

**Describe the solution you'd like**
I'd love to have a column swap button. Basically you push it and it swaps the contents of the columns. Everything that was on the right is on the left and vice versa. It's a little trickier when you have more than two columns but I think you could have the middle column in a three column stay in place while the others flip and with four you can have the right two swap with the left two.