The help dialog currently uses the trigger registry to help list keyboard shortcuts. We should do a similar thing for the sequence registry so we can output a listing like:
Things to consider:
- Do we need to indicate which sequences must match the start of a paragraph first (e..g list, but not links)
- How to generate the descriptions and key sequence labels. Should be easy for the simple ones above for some are regex based.
- Some sequences probably shouldn't be listed, e.g. all the auto-linking sequences (http://, ISBN) and the wikitext warning sequences
- VE-MW has many more sequences than VE-core so test in both.