function updateNav() {
  const newNav = `
    <img
      id="prev-btn"
      class="${historyHead <= 0 ? 'disabled' : 'ico-btn '}"
      type="icon"
      src="../res/prev_btn.svg"
      alt="Previous Result"
    >

    <img
      id="next-btn"
      class="${historyHead >= history.length - 1 ? 'disabled' : 'ico-btn '}"
      type="icon"
      src="../res/next_btn.svg"
      alt="Next Result"
    >

    <div
      id="settings-btn"
      class="ico-btn"
      type="icon"
      style="display: inline-block;"
    >
      <img
        type="icon"
        src="../res/settings_btn.svg"
        alt="Settings"
      >
    </div>
  `;

  document.querySelector('#nav-region').innerHTML = newNav;
  document.querySelector('#prev-btn').onclick = () => jumpToPrevious();
  document.querySelector('#next-btn').onclick = () => jumpToNext();
  document.querySelector('#settings-btn').onclick = () => openConfig();
}
Updates the Navigation: 'Next' and 'Previous' buttons