Implement stable sorting algorithm / Multiple column sorting

When you sort emails by a column that has a lot of duplicate values (e.g. sorting by “From”) and then take an action on an email, the order of the emails can jump around randomly.

The emails should remain in the same order, even if one is triaged.

This could be solved by including a final ordering param (e.g. always have a final order by ID or date).

It would also help to be able to sort by multiple columns, e.g. From ASC subject ASC