Tab title text is always bold instead of respecting selected font style

[nyanpasu64]

描述这个Bug
When I set a font for a tab title, it always displays in bold instead of my selected style (regular, italic, etc.)

重现过程
重现过程的步骤:

1. Right-click the tab bar and pick Options.
2. In the left sidebar click Appearance.
3. Click the Text Font button and pick a Regular font style.
4. Click Apply.

期望的结构
The font in tab titles is not bolded.

截图

系统环境:

• 操作系统: Windows 10 22H2
• .net framework: ???
• 软件版本: v1.5.6-beta.1
• 重点、重点、重点；没有报错日志本地复现不了的话，那这个问题不会处理
  上传报错日志(C:\Users\Administrator\AppData\Roaming\QTTabBar\QTTabBarException.log): it crashed once while trying to set settings during VS2022 Community installation, QTTabBarException.log