Merge pull request #302 from coliff/patch-1

remove unneeded -ms-filter (was only needed for IE8)

css/style.css

@@ -194,9 +194,6 @@
 	vertical-align: top;
 	margin-top: 2px;
 	background-size: contain;
-
-	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";
-	filter: alpha(opacity=50);
 	opacity: .5;
 }
 .activity-icon img {