Address code smells from #30453 (#31083)

* check recents length

* Improve sorting logic in capabilities dialog

* Fix allowedHosts regex array check

* Remove double negative in filter checks

* prettier

src/utils/permalinks/Permalinks.ts

@@ -217,7 +217,7 @@ export class RoomPermalinkCreator {
 
                 const allowed = aclEvent.getContent<{ allow: string[] }>().allow;
                 allowedHostsRegexps = []; // we don't want to use the default rule here
-                if (Array.isArray(denied)) {
+                if (Array.isArray(allowed)) {
                     allowed.forEach((h) => allowedHostsRegexps.push(getRegex(h)));
                 }
             }