new KB headlines notes

[KatyaMik]

Home page:

• Change "Get Lost?" to "Lost?"
• "FAQs," to "FAQ"
• Community card: Change "Join our MEW community, and get more information from us." to "Join the MEW community to get more information."
• add link to Medium

Categories page:

• under Access wallet, change "MEWconnectMigrating" to "MEWconnect"

Videos page:

• add MEW5 category and these videos:
  https://www.youtube.com/watch?v=x7U6aEujVnk&t=7s
  https://www.youtube.com/watch?v=KISROTeoN3M
  https://www.youtube.com/watch?v=9_6EU1QPU0k&t=1s

Categories -> Diving deeper:

• Wrong title in menu ("What Happens if MEW Goes Down" twice, one of them should be "Using a Ledger Hardware Wallet With an Android Device")

Overall:

• In the last article of categories, right button says "Next > None". Perhaps it should guide to the first article in next category (same for Previous button in first article of category)