The online bank connection flow for Yodlee and Plaid has been redesigned so setup and synchronization happen through one clearer client-side dialog. This should make bank linking easier to maintain and improve the user experience, while also adding institution data for supported providers.

This branch refactor entirely account_yodlee, account_online_synch and account_plaid.

server side has been simplified, no more transient model that calls other transient model, all the logic is now client side inside one single dialog