neomutt: added missing sort options (#6283)

* neovim: add valid sort options

Neomutt added a new prefix for sort options in 2022.
Added the new possible prefixes to the neomutt module.

modules/programs/neomutt.nix

@@ -372,7 +372,12 @@ in {
       sort = mkOption {
         # allow users to choose any option from sortOptions, or any option prefixed with "reverse-"
         type = types.enum
-          (sortOptions ++ (map (option: "reverse-" + option) sortOptions));
+          (builtins.concatMap (_pre: map (_opt: _pre + _opt) sortOptions) [
+            ""
+            "reverse-"
+            "last-"
+            "reverse-last-"
+          ]);
         default = "threads";
         description = "Sorting method on messages.";
       };