discourse/app/assets/stylesheets/mobile/history.scss

.modal.history-modal {
  button {
    float: none;
  }
  #display-modes {
    display: none;
  }
  #revision-numbers {
    line-height: $line-height-large;
  }
  img {
    max-width: 95%;
    height: auto;
  }
  .revision-content {
    table {
      table-layout: fixed;
      width: 100%;
      word-wrap: break-word;
    }
  }
}