- [GUI] bound 'backspace' key to command to get backward in the browsing history.

src/gui/client/main-window.lisp

@@ -1925,16 +1925,10 @@ local file paths."
                     (scale-gemtext main-window -0.1))))
             :exclusive t)
   (gui:bind target
-            #$<Control-4>$
+            #$<BackSpace>$
             (lambda (e)
               (declare (ignore e))
-              (scale-gemtext main-window 0.1))
-            :exclusive t)
-  (gui:bind target
-            #$<Control-5>$
-            (lambda (e)
-              (declare (ignore e))
-              (scale-gemtext main-window -0.1))
+              (funcall (back-iri-clsr main-window)))
             :exclusive t))
 
 (defun init-main-window (starting-iri)