Added dark background to mod icons for better visibility

Author: wyndchyme

mods/index.html

@@ -99,6 +99,7 @@
         box-shadow: 0 2px 5px black;
         border: 2px solid white;
         filter: brightness(1.1);
+        background-color: rgba(0, 0, 0, 0.5);
     }
     .webkit-fix {
         transform: translateY(-20px);