cancel rematch offers if going to RPA

ui/round/src/view/button.js

@@ -143,6 +143,7 @@ module.exports = {
   },
   analysis: function(ctrl) {
     if (game.replayable(ctrl.data)) return m('a.button.replay_and_analyse', {
+      onclick: partial(ctrl.socket.send, 'rematch-no', null),
       href: ctrl.router.Round.watcher(ctrl.data.game.id, ctrl.data.player.color).url
     }, ctrl.trans('analysis'));
   }