perf: Reduce initial bundle size / async bundle loading (#1456)

* feat: Move to React.lazy

* perf: Remove duplicate babel/runtime

* fix: Run yarn-deduplicate

* Further attempts to remove rich-markdown-editor from initial chunk

* perf: Lazy loading of authenticated routes

* perf: Move color picker to async loading
fix: Display placeholder when loading rich editor

* fix: Cache bust on auto reload

server/services/backlinks.js

@@ -1,8 +1,8 @@
 // @flow
 import { difference } from "lodash";
-import parseDocumentIds from "../../shared/utils/parseDocumentIds";
 import type { DocumentEvent } from "../events";
 import { Document, Revision, Backlink } from "../models";
+import parseDocumentIds from "../utils/parseDocumentIds";
 import slugify from "../utils/slugify";
 
 export default class Backlinks {