Style: reduce user picure shadow

resource/css/_page.scss

@@ -170,11 +170,6 @@
         }
       }
 
-      .liker-list, .contributor-list, .seen-user-list {
-        .picture-rounded {
-          box-shadow: 0 0 2px #666;
-        }
-      }
       .liker-count, .contributor-count, .seen-user-count {
         font-size: 1.2em;
         font-weight: bold;

resource/css/crowi.scss

@@ -176,7 +176,7 @@ footer {
   }
   &.picture-rounded {
     border-radius: 50%;
-    box-shadow: 0 0 2px #ccc;
+    box-shadow: 0 0 2px rgba(0,0,0,.3);
   }
 }
 // components