Improve the language behaviors around the PWI (#3545)

* Handle leftnav overflow with longer languages' copy

* Update the language dropdown to set ALL language prefs

* Add hackfix to language cachebusting on PWI

* Reset feeds on language change

src/state/queries/post-feed.ts

@@ -459,6 +459,14 @@ function assertSomePostsPassModeration(feed: AppBskyFeedDefs.FeedViewPost[]) {
   }
 }
 
+export function resetPostsFeedQueries(queryClient: QueryClient, timeout = 0) {
+  setTimeout(() => {
+    queryClient.resetQueries({
+      predicate: query => query.queryKey[0] === RQKEY_ROOT,
+    })
+  }, timeout)
+}
+
 export function resetProfilePostsQueries(
   queryClient: QueryClient,
   did: string,