folders not visible on copied mail folders

[Kenneth Porter]

--On Thursday, July 19, 2018 10:33 PM -0400 Mark Foley <mfoley at ohprs.org> 
wrote:

> Shortly after this post, I found a solution here:
> http://forums.mozillazine.org/viewtopic.php?t=1097725
>
> In order to see the .Dennis\ Email.Dennis\ Inbox sub-folder you have to
> collapse and re-expand the folder list in Thunderbird. It's that simple
> ... AND that annoyingly obscure!

That sometimes works. Sometimes I have to open the Subscribe dialog and 
open/close the new hierarchy there. It's very tedious and annoying. I'd 
love to have a Thunderbird addon that automatically does this, either on 
demand or at every Thunderbird start when an account is first opened.