display flash errors for external auths like saml or oidc on the login screen #6154

Signed-off-by: si458 <simonsmith5521@gmail.com>

common.js

@@ -404,4 +404,19 @@ module.exports.convertStrArray = function (object, split) {
     } else {
         return []
     }
+}
+
+module.exports.uniqueArray = function (a) {
+    var seen = {};
+    var out = [];
+    var len = a.length;
+    var j = 0;
+    for(var i = 0; i < len; i++) {
+         var item = a[i];
+         if(seen[item] !== 1) {
+               seen[item] = 1;
+               out[j++] = item;
+         }
+    }
+    return out;
 }