Why can't the bookmark icon be modified?

[Xzaohui]

trafficstars

Have you read a contributing guide?

• [x] I have read CONTRIBUTING.md
• [x] I have searched the existing requests and didn't find any that were similar
• [x] I have considered creating a pull request instead and want to proceed

Clear and concise description of the problem

The bookmark icon cannot be modified. In previous versions, it was possible to modify the layout type and add the icon.

Suggested solution

In the default format, add the icon modification feature.

Alternative

No response

Additional context

version:0.46.1