message_list_data: Remove dependency on filter.js.

This commit removes dependency on `filter.js` by lifting the construction
of `Filter` object up in `all_messages_data.js`.

web/src/all_messages_data.js

@@ -1,5 +1,7 @@
+import {Filter} from "./filter";
 import {MessageListData} from "./message_list_data";
 
 export const all_messages_data = new MessageListData({
     excludes_muted_topics: false,
+    filter: new Filter(),
 });