jupyter_notebook/static/edit/less/menubar.less

.selected-keymap {
  i.fa {
    padding: 0px 5px;
  }
  i.fa:before {
    content: @fa-var-check;
  }
}

#mode-menu {
  // truncate mode-menu, so it doesn't get longer than the screen
  overflow: auto;
  max-height: 20em;
}

.edit_app {
  #header {
    .box-shadow(@global-shadow);
  }

  #menubar .navbar {
    /* Use a negative 1 bottom margin, so the border overlaps the border of the
    header */
    margin-bottom: -1px;
  }
}