Seed phrase stuff

[dkackman]

fix #681 by adding a note on the create and import screens - also add card to these screens
fix #567 clean seed phrase on import

split on anything that isn't [a-zA-Z]

  function cleanKey(key: string) {
    return key
      .trim()
      .replace(/[^a-z]/gi, ' ')
      .split(/\s+/)
      .filter((item) => item.length > 0)
      .join(' ')
      .toLowerCase();
  }