shows a problem with node.js blessed keybaord handling (fixed in pull request)

gistfile1.js

var blessed = require('blessed');

// Create a screen object.
var screen = blessed.screen();

var list1 = blessed.list({
  width: 50,
  height: 10,
  top: 1,
  left: 1,
  fg: 'blue',
  border: {
    type: 'line'
  },
  selectedBg: 'green',
  keys: true,
  vi: true
});

list1.setItems([
  'one',
  'two',
  'three',
  'four',
  'five'
]);

list1.prepend(new blessed.Text({
  left: 2,
  content: ' My list1 '
}));

var list2 = blessed.list({
  width: 50,
  height: 10,
  top: 2,
  left: 10,
  fg: 'blue',
  border: {
    type: 'line'
  },
  selectedBg: 'green',
  keys: true,
  vi: true
});

list2.setItems([
  'six',
  'seven',
  'eight',
  'nine',
  'ten'
]);

list2.prepend(new blessed.Text({
  left: 2,
  content: ' My list2 '
}));

// Select the first item.
list1.select(0);

screen.key('q', function(ch, key) {
  return process.exit(0);
});

screen.append(list1);
list1.focus();
screen.render();

var visible = false;
list1.key('a', function(ch, key) {
  if (!visible) {
    screen.append(list2);
    list2.focus();
    screen.render();
    visible = true;
  }
});

list2.key('b', function(ch, key) {
  if (visible) {
    screen.remove(list2);
    screen.render();
    visible = false;
  }
});