Ensure that media messages are cached when loaded from convo settings

ts/textsecure/cds/RateLimitedError.ts

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 export type RateLimitedErrorPayloadType = Readonly<{
-  // eslint-disable-next-line camelcase
   retry_after?: number;
 }>;
 

ts/views/conversation_view.tsx

@@ -2218,6 +2218,11 @@ export class ConversationView extends window.Backbone.View<ConversationModel> {
         limit,
       });
 
+    // Cache these messages in memory to ensure Lightbox can find them
+    messages.forEach(message => {
+      window.MessageController.register(message.id, message);
+    });
+
     const loadedRecentMediaItems = messages
       .filter(message => message.attachments !== undefined)
       .reduce(