Checklist style button and autocomplete

[josh-clarke]

GFM recognizes and renders the checkbox syntax of Markdown. I find this useful for todo lists.

Example:

- [ ] item one
- [ ] item two

Which renders as:

• item one
• item two

This works in Noteless if I type it in manually, but I wonder if a button for the checkbox bullet style could be added to the style bar, as well as detection that automatically adds a todo bullet on a new line if it is detected on the previous line?