feature: allow autocomplete of seed words

[2011]

All of the words on the BIP 39 word list begin with a unique set of four letters (except, of course, for the three-letter words). In every other crypto wallet I have ever used, the wallet will complete the word after I type in the first four letters. I suppose I wouldn't care if Rabby just allowed incomplete words (just the first four letters), but no, Rabby wants the entire word. I don't store the entire word (all of the metal seed phrase backup wallets only have four letters per word), so every time I enter (restore in the vast majority of cases) a seed phrase, I have to have the BIP 39 word list with me to look up the entire word from the first four letters (yes, I can guess many, or even most, of the words from the first four letters, but having to find the correct word out of multiple possibilities for the non-obvious cases represents something that detracts from the user experience with no apparent benefit).