Now we process the rendered HTML of tiddlers, which allows us to
process HTML generated by MS Word. In fact, the HTML that MS Word
generates is so awful, I’ve instead been using Mammoth to do the
conversion: https://github.com/mwilliamson/mammoth.js
Also some necessary improvements to the fake dom implementation.
1. Introduce template tiddlers for the document, each tiddler, and the
tiddler toolbar
2. Move the text slicer toolbar button to the left of the edit button
3. Add a selectable toolbar, currently just containing the tiddler title