more tweaking to server consent flow and changing servers on preview

src/Link.js

@@ -15,6 +15,7 @@ limitations under the License.
 */
 
 import {createEnum} from "./utils/enum.js";
+import {orderedUnique} from "./utils/unique.js";
 
 const ROOMALIAS_PATTERN = /^#([^:]*):(.+)$/;
 const ROOMID_PATTERN = /^!([^:]*):(.+)$/;
@@ -56,16 +57,6 @@ export const LinkKind = createEnum(
 	"Event"
 )
 
-function orderedUnique(array) {
-	const copy = [];
-	for (let i = 0; i < array.length; ++i) {
-		if (i === 0 || array.lastIndexOf(array[i], i - 1) === -1) {
-			copy.push(array[i]);
-		}
-	}
-	return copy;
-}
-
 export class Link {
 	static parse(fragment) {
 		if (!fragment) {