悬空 Qt 对象访问

[LevelDownRefine]

运行launcher.py后，对已有脚本配置编辑后，存在如下错误

Traceback (most recent call last):
  File "C:\Users\WinSa\Documents\OneDragon-ScriptChainer\src\one_dragon_qt\widgets\setting_card\expand_setting_card_group.py", line 80, in _update_separators
    if card.isVisible():
       ^^^^^^^^^^^^^^^^
RuntimeError: Internal C++ object (MultiValueDisplayComboBoxSettingCard) already deleted.

commit: b7b55f9
复现方式:

1. uv run python src\script_chainer\win_exe\launcher.py
2. 点击编辑

3. 点击取消