If transferring messages between different accounts, move them one by one so that the operation can be cancelled by the user. Partially fixes NB#78460
If transferring messages between different accounts, move them one by
one so that the operation can be cancelled by the user.
Partially fixes NB#78460

pmo-trunk-r4110

community-ssu/modest,community-ssu/modest,community-ssu/modest,community-ssu/modest