fix positioning issue of share dropdown in intermediate widths

core/css/share.css

@@ -8,7 +8,7 @@
 	border-bottom-right-radius: 5px;
 	box-shadow:0 1px 1px #777;
 	display:block;
-	margin-right:112px;
+	margin-right: 0;
 	position:absolute;
 	right:0;
 	width:420px;