Swap rows / Reverse row buttons

[guyguy2001]

A button which will swap rows could be really useful if you make a mistake in the ordering, or realize while working that your ordering was sub-optimal (or if you just want to try 2 different things).

A reverse row button will reverse the sequence in the row. It can be very useful because the direction of the RNA matters a lot in this tool, as if your RNA is in the opposite direction your solution is as good as nonexistent.

I think that the row swap tool should have a small double directional arrow, similiar to this one, and that the row reverse button should be a double directional flat arrow, like this one.