Pockets transactions on load

[aspic]

Fetches more info when pressing an account in the account list. Fixes #98 (but keeps both places). Also fixes #106, also fixes #74

• fetches representative prior to resolving blocks
• skips trying to resolve pending if there is none (this dropped 3 node calls)
• added helper function to update the Wallet after an Account has been updated

Not 100% satisified with the solution, we can at least save one RPC call by calling account_info which can give us balance + representative. That can be fixed in the next round.

[Citrullin]

Can't send a transaction. Always fails

[aspic]

@Citrullin was unable to reproduce your last issue, please open a new one if it's still an issue :thinking: