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/state/models/feeds/multi-feed.ts

@@ -6,7 +6,7 @@ import {CustomFeedModel} from './custom-feed'
 import {PostsFeedModel} from './posts'
 import {PostsFeedSliceModel} from './post'
 
-const FEED_PAGE_SIZE = 5
+const FEED_PAGE_SIZE = 10
 const FEEDS_PAGE_SIZE = 3
 
 export type MultiFeedItem =
@@ -147,6 +147,15 @@ export class PostsMultiFeedModel {
     await this.loadMore(true)
   }
 
+  /**
+   * Load latest in the active feeds
+   */
+  loadLatest() {
+    for (const feed of this.feeds) {
+      /* dont await */ feed.refresh()
+    }
+  }
+
   /**
    * Load more posts to the end of the feed
    */