You simply have to be more careful.
missclicking.

happened to me a lot but you just have to get over it. And mine was against far higher rated players than I.
As Eventhorizon said you just have to be more careful. I dont think a 1sec takeback move is in the right direction. If this happens to you, just take it as a reminder not to be sloppy even against lower rated players.
I had three games right now against the same opponent, in two of them i lost simply because I missclicked with my queen - not so nice. He didn't want to accept draw, which will anyway give him some points (as im rated higher then him.), and I just trolled the game to the end, without any option to get back. in the third game I won him easily, so I know I was able to win those games, and losed only because of those missclicks.
I think there shall be option to get back in one sec, atleast if the opponent did nothing after it.