Disable history when executing maps

Fixes #476

src/input_handler.cc

@@ -1336,6 +1336,7 @@ void InputHandler::handle_key(Key key)
         if (keymaps.is_mapped(key, keymap_mode) and
             not m_context.keymaps_disabled())
         {
+            ScopedSetBool disable_history{context().history_disabled()};
             for (auto& k : keymaps.get_mapping(key, keymap_mode))
                 current_mode().handle_key(k);
         }