The placement of the done button when doing things like attack moves and wall segments should be moved to the same place as the pass button to prevent miss clicks. Its a minor thing but it has happened to me at least twice now and while i only have my self to blame other people might get more frustrated then me by it.
I assume the positioning of the pass button is for a reason so that is why i suggest it takes up that spot since pass isn't a option while placing walls anyway.