ability to change folder order from Thunderbird Folder Pane, rather than extension dialog
Would be great if folders could be ordered without having to go to the extension's preferences. So folders would have the "move up" and "move down" actions available in their context menu.
Related (and maybe easier to code) would be having MoveUp and MoveDown being available commands for binding to keys in keyconfig. Or maybe there already is a JS snippet that does that that we can bind with keyconfig?
If #14 was implemented, then the ability to "sort this folder" from the folders sidebar would be great also.
The real thing you want to do is allow drag & drop in the folder sidebar. That's complicated, though, and that's a lot of extra code. However, if you were to rewrite the addon to work that way, it would be worthwhile to investigate landing that in core, i.e. I'm sure with a proper drag & drop system, the module owners would be happy to integrate this as a core feature. Right now, the addon doesn't blend with the rest of the UI: it's a separate dialog, it's clumsy...