Fix permanent display of favorite icon

Signed-off-by: Jan-Christoph Borchardt <hey@jancborchardt.net>

apps/files/css/files.scss

@@ -617,6 +617,12 @@ a.action > img {
 	opacity: .7;
 }
 
+#fileList .action.action-favorite.permanent {
+	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
+	filter: alpha(opacity=100);
+	opacity: 1;
+}
+
 #fileList .fileActionsMenu a.action:hover,
 #fileList .fileActionsMenu a.action:focus,
 /* show share action of shared items darker to distinguish from non-shared */