It would be nice to have a feature to easily move cards from the sideboard to the main deck and from the main deck to the sideboard.
Thanks

That is easily done already.

There is a little dropdown arrow next to each card in a deck. Clicking it will give you the option to move One or All of a particular card to/from the sideboard.

Oops, sorry I didn't see it. It was not super clear! You can close this