Small refactor of URLParams stuff

Splits out the room locartion parsing from everything else to avoid
one function that fills out different parts of its return struct
depending on its args.

src/room/RoomPage.tsx

@@ -22,22 +22,17 @@ import { ErrorView, LoadingView } from "../FullScreenView";
 import { RoomAuthView } from "./RoomAuthView";
 import { GroupCallLoader } from "./GroupCallLoader";
 import { GroupCallView } from "./GroupCallView";
-import { useUrlParams } from "../UrlParams";
+import { useRoomIdentifier, useUrlParams } from "../UrlParams";
 import { useRegisterPasswordlessUser } from "../auth/useRegisterPasswordlessUser";
 import { useOptInAnalytics } from "../settings/useSetting";
 import { HomePage } from "../home/HomePage";
 
 export const RoomPage: FC = () => {
-  const {
-    roomAlias,
-    roomId,
-    viaServers,
-    isEmbedded,
-    preload,
-    hideHeader,
-    isPtt,
-    displayName,
-  } = useUrlParams();
+  const { isEmbedded, preload, hideHeader, isPtt, displayName } =
+    useUrlParams();
+
+  const { roomAlias, roomId, viaServers } = useRoomIdentifier();
+
   const roomIdOrAlias = roomId ?? roomAlias;
   if (!roomIdOrAlias) {
     console.error("No room specified");