Improve deleting heading element using Fn+Del

[LoneFireBlossom]

Is there an existing issue for this?

• I have searched the existing issues

Can the issue be reproduced with the default theme (daylight/midnight)?

• I was able to reproduce the issue with the default theme

Could the issue be due to extensions?

• I've ruled out the possibility that the extension is causing the problem.

Describe the problem

在列表里有X级标题的时候按Fn+Delete表现不符合预期。如Gif所示，两种情况下Fn+delete表现不一致，第二种情况应该与第一种情况保持一致——按fn+delete使得下一行abc在去掉一级标题格式之后上移才对。

Expected result

。

Screenshot or screen recording presentation

No response

Version environment

- Version: 3.0.3
- Operating System: 
- Browser (if used):

Log file

很容易复现

More information

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