Add word suggestions for Recovery Phrase verification and Account import

[Tbaut]

To enhance the UX, prevent users from having typos or help in case they can't read what they wrote on a piece of paper, we should have suggestion/auto-completion.

• no suggestion shown if no word typed or last character typed is a space.
• upon suggestion word click add the word to the phrase and a white space
• show suggestions from both Parity or BIP32 word dictionaries and figure out as soon as possible if the words typed in are from one or the other dictionary and then only show relevant suggestion.