🍒 kcms/tabbox: Use higher resolution thumbnails for previews (!5013) · Merge requests · Plasma / KWin

Replace the hardcoded thumbnails which have a low resolution for current screen standards (~300x200), with higher resolution ones (~1200x800).

Also set the new 6.0 wallpaper as the fallback desktop thumbnail

BUG: 446765 FIXED-IN: 5.93.0

(cherry picked from commit efde6c8e)

🍒 kcms/tabbox: Use higher resolution thumbnails for previews