Normalize bindings correctly when checking key_mappings

qutebrowser/keyinput/basekeyparser.py

@@ -127,8 +127,13 @@ class BaseKeyParser(QObject):
         if binding is None:
             self._debug_log("Ignoring only-modifier keyeevent.")
             return False
-        binding = binding.lower()
-        binding = config.val.bindings.key_mappings.get(binding, binding)
+
+        key_mappings = config.val.bindings.key_mappings
+        try:
+            binding = key_mappings['<{}>'.format(binding)][1:-1]
+        except KeyError:
+            pass
+
         try:
             cmdstr = self.special_bindings[binding]
         except KeyError:

qutebrowser/utils/utils.py

@@ -407,7 +407,7 @@ def keyevent_to_string(e):
         if mod & mask and s not in parts:
             parts.append(s)
     parts.append(key_to_string(e.key()))
-    return '+'.join(parts)
+    return normalize_keystr('+'.join(parts))
 
 
 class KeyInfo: