Similar issues: #401
binds.conf, attempting to assign a keybinding using Ctrl and a "special key" fails with the message
Unknown key 'C-Left' (or similar).
The expected behavior would be for these commands to function similar to Vim's remap features - ex.
<S-Tab> (although the latter is covered by
<BackTab>) would be parsed as Ctrl + Left and Shift + Tab.
man aerc-config does not mention supporting
<C-Left> or similar, so I suspect this is more of a feature request than a bug...