Fix regression in previous release that caused --debug-config to fail when printing shortcuts

Forgot to adjust the print shortcuts code for native shortcuts.
Fixes #695

kitty/cli.py

@@ -624,7 +624,7 @@ def print_shortcut(key_sequence, action):
     keys = []
     for key in key_sequence:
         names = []
-        mods, key = key
+        mods, is_native, key = key
         for name, val in mmap.items():
             if mods & val:
                 names.append(name)

kitty/config.py

@@ -37,7 +37,7 @@ def parse_shortcut(sc):
     parts = sc.split('+')
     mods = parse_mods(parts[:-1], sc)
     if mods is None:
-        return None, None
+        return None, None, None
     key = parts[-1].upper()
     key = getattr(defines, 'GLFW_KEY_' + named_keys.get(key, key), None)
     is_native = False