SOCIAL-208 Improving social post sidebar (#46007)

* SOCIAL-208: Updating sidebar section titles

* SOCIAL-208: Moving Social Image Generator

* changelog

* Fixing header structure

* Fixing E2E test

* Removing preview header

* Updating last sidebar section title

* Remove the unnecessary fragment

* Improve changelog entries

* Migrate SIG preview component to TS

* Update label for link preview trigger

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Co-authored-by: Grzegorz Chudzinski-Pawlowski <>
Co-authored-by: Manzoor Wani <[email protected]>

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/19638071939

Upstream-Ref: Automattic/jetpack@ff20b2c

Author: gmjuhasz