Unify initial getters #1977
Description
Currently some of the get_initial_<something> procedures in the account module implicitly return the values corresponding to the native account regardless of which account is current — native or foreign. We should rework them so that any get_intitial_* procedure would return the initial value of the current account.
To be able for the foreign accounts to get the data of the native account, we should create (or modify) procedures to have native "infix" in their names, making it clear that the returning value is associated with the native account. Some of the existing procedures already implement this (like get_native_id).
Originally posted by @Fumuran in #1959 (comment) and @bobbinth in #1959 (comment)