Bug 1175902 - Move the shadow to #detail-screenshot. r=mossop

toolkit/themes/shared/extensions/extensions.inc.css

@@ -676,14 +676,13 @@
 
 #detail-screenshot-box {
   -moz-margin-end: 2em;
-  padding: 10px;
-  background-color: white;
-  box-shadow: 0 1px 2px #666;
 }
 
 #detail-screenshot {
   max-width: 300px;
   max-height: 300px;
+  background-color: white;
+  box-shadow: 0 1px 2px #666;
 }
 
 #detail-screenshot[loading] {