fix(editor): sorting of page emoji display toggle (#15020)

Fixes the order of the new setting toggle introduced in #14999.
It appeared between "Auto-title new docs with current date" and "New doc
date format" which both belong together.

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## Summary by CodeRabbit

* **Style**
* Repositioned the "display add icon option" setting within General
settings for improved interface organization and logical grouping.

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