code: function () {
  			var self = this;
  			console.log('clearing...');
  			var req = get_req();
  			req.onreadystatechange = function clear_state_response () {
  				if (req.readyState === 4) {
  					htracr.ui.clear();
  				}
  			};
  			req.open("POST", "/clear", true);
  			req.send("");
  			return false;
  		}
docs: remove capture info from the server