Server Error: Failed to send fetch command

[vantky21415]

i have a problem "Server Error: Failed to send fetch command".
then, i solved it following.
 https://www.mail-archive.com/users@lists.roundcube.net/msg08143.html

now, i want to ban  sort list by name, date and so on.
how can i make it, or i want to hide LIST OPTIONS which is the little grid icon on the left of the column title bar.