More custom-feed behavior fixes [APP-678] (#831)

* Remove extraneous custom-feed health check

* Fixes to custom feed preference sync

* Fix lint

* Remove dead code (client-side suggested posts constructor)

* Enforce the feed-fetch limit in the client if the generator fails to observe the parameter

* Bump the number of items fetched in the multifeed per feed from 5 to 10

* Reset the currently active feed when the pinned feeds change

* Some fixes to icons

* Add a prompt to load latest to the multifeed

* Remove debug

src/view/screens/Home.tsx

@@ -52,8 +52,15 @@ export const HomeScreen = withAuthRequired(
         model.setup()
         feeds.push(model)
       }
+      pagerRef.current?.setPage(0)
       setCustomFeeds(feeds)
-    }, [store, store.me.savedFeeds.pinned, customFeeds, setCustomFeeds])
+    }, [
+      store,
+      store.me.savedFeeds.pinned,
+      customFeeds,
+      setCustomFeeds,
+      pagerRef,
+    ])
 
     useFocusEffect(
       React.useCallback(() => {