restore account ordering by name

it was nice to use the ordering from hledger, but after the migration to
 room this worked only by chance - sqlite returned the rows in the order
 they were inserted. this means that any new accounts will end up at
 the bottom. this is the case when speculative transaction storage is
 active (coming soon) and the transaction has a new account.

 also, the conversion from db account objects to UI list relies on the
 ordering now.

 in a future version, the accounts table may store the hledger ordering
 in a new column, but this doesn't completely solve the problem when
 adding new accounts speculatively