fix(WallpaperText): position fixed affects only the brick image

(cherry picked from commit 000f7c72)

Co-authored-by: Michael Danielczok <michael@pcsg.de>

src/QUI/PresentationBricks/Controls/WallpaperText.css

@@ -42,7 +42,7 @@
     clip-path: inset(0);
 }
 
-.wallpaperText.fixed picture {
+.wallpaperText.fixed .wallpaperText__imageWrapper picture {
     position: fixed;
     top: 0;
     display: block;