WALLNODE 1.2.3

• Thumbnails show on every PC. Most are WebP images, which the app could only read with Microsoft's "WebP Image Extensions" installed. Without it, as on N and LTSC editions of Windows or PCs without the Microsoft Store, most thumbnails stayed as grey boxes. The app now decodes WebP itself.
• On those same PCs, matching rotation to a dark or light theme works, and a wallpaper's preview can fall back to its thumbnail when offline.