New feature: auto suggested recipients

When adding or editing a recipient using the default flow, typing the first name, last name or email will now suggest matching recipients from your account's history. 

Clicking a suggested recipient will auto-fill their personal information. Deleting an envelope will remove its recipients from the auto-suggestion list.

NB: The matching recipients will be suggested based on all the data entered in the fields. For example, if "Smith" is entered as the Last name, when typing "John" in the First name then the feature will no longer show "John Doe" as a result, since the Last name does not match (Smith ≠ Doe)