next: Fix shell buffer default modes

.config/next/init.lisp

@@ -107,6 +107,9 @@
 
 (define-command shell ()
   "Open a shell buffer."
-  (set-active-buffer *interface* (make-buffer :name "*shell*" :default-modes '(shell-mode))))
+  (set-active-buffer *interface*
+                     (make-buffer :name "*shell*"
+                                  :default-modes (cons 'shell-mode
+                                                       (get-default 'buffer 'default-modes)))))
 
 (define-key "C-x s" #'shell)