Topic/1276 dfn aai frontend

coscine/issues#1276

src/STS/Views/Account/Logout.cshtml

@@ -8,7 +8,12 @@
     <title>Logout - Coscine</title>
     <link rel="icon" href="/_layouts/15/images/Coscine.SharePoint.RWTHMaster/Favicon.png"/>
     <script type="text/javascript">
-        localStorage.clear();
+        var storedKeys = Object.keys(localStorage);
+        for (var i = 0; i < storedKeys.length; i++) {
+            if (storedKeys[i] !== 'coscine.login.storedData') {
+                localStorage.removeItem(storedKeys[i]);
+            }
+        };
         sessionStorage.clear();
         window.location.href = "@Html.Raw(ViewBag.LoginUrl)";
     </script>