Todo Checkbox in Lower Right

Last thing, while playing around with this option, I’ve added many folders from the Drafts section and I now know because a todo box with a tick on the side is shown on the bottom right. I want to remove this, how do I do that?

If you’re referring to the little icon in the lower right corner of the text editor, that isn’t a “todo” marker. It indicates whether or not this section of the draft is meant to be compiled. Click it to toggle it for things like notes and old revisions.