Overview of changes in 3.23.92
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* Bugs fixed:
 763712 Use G_DECLARE_FINAL_TYPE
 777869 Letterbox photo thumbnails
 779380 Add a flatpak manifest
 779589 Emit GdMainBox::selection-changed only after updating the selection

* Updated translations:
 Traditional Chinese (Taiwan)
 Czech
 Danish
 Galician
 Italian
 Korean
 Lithuanian
 Serbian
 Slovak
 Swedish
 Vietnamese