Bump assets version link to /56/.
Let downvotes result in the downvoted post considered read.
Add editor, connect it to the reply button, add multireply toggling.
Connect the Improve button to the new editor, remove diff and preview code.
Fix editor bugs.
Require that page exists when saving edits, disable page creation for now

Don't create pages lazily.
Fix forum topic creation, break out editor-opener.js
Fix title hidden bug: remove old unneeded code.
Always create page title body for new page, remove DummyPage.
Fix editor bugs.
Make editor work for embedded comments.
Refactoring, get rid of editor-opener.js.
Make the embedded editor work for editing posts (not just replying).
Make editor resizable.
Fix TypeScript compilation error and is-replying-mark bug.
Post, save and render multireplies

Some problems remain: float drop with 2d layout, closed threads placed
before multireplies.
Insert multireplies at correct location when loading one at a time.
Highlight/zoom-to multireplied post when hovering/clicking multireply

And fix #/post-123 bud (should be #post-123 with no '/').
Make editor preview work, improve editor

- Resize textarea and preview
- Clear is-replying marks
- Empty textarea after posting reply
Update modules/definitely-typed, add React.js typedefs.