use high-resolution checker images
This fixes an issue on Safari where image-rendering was ignored for the background images, resoluting in blurry backgounds.
Before Width: | Height: | Size: 97 B After Width: | Height: | Size: 249 B |
Before Width: | Height: | Size: 97 B After Width: | Height: | Size: 247 B |
Before Width: | Height: | Size: 97 B After Width: | Height: | Size: 251 B |
Before Width: | Height: | Size: 97 B After Width: | Height: | Size: 252 B |
Before Width: | Height: | Size: 97 B After Width: | Height: | Size: 251 B |