Fix #859: Stop mosaic effect on cover photo in Stats
Fix #859: Stop mosaic effect on cover photo in Stats

coderdojo-japan/coderdojo.jp,yasslab/coderdojo.jp,yasslab/coderdojo.jp,yasslab/coderdojo.jp,coderdojo-japan/coderdojo.jp,coderdojo-japan/coderdojo.jp,coderdojo-japan/coderdojo.jp