When creating a folder in one command on Gmail you end up with
one tag such as 'x/y/z' instead of three nested tags such as 'z'
inside of 'y' inside of 'x'. Creating each layer individually
results in the desired nested label structure.
This was tested in a personal transfer of email from a remote
IMAP server to Gmail.
OfflineIMAP/offlineimap#335OfflineIMAP/offlineimap#598
Signed-off-by: Kyle Altendorf <sda@fstab.net>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>