BUG: flow editor headings and full note issues

[huachuman]

Currently the flow editor seems to eat the ##headings.

Would be great to have an option that includes headings in the flow editor.

edit: it looks like it's now displaying the whole note so it's got the headings but also the entire rest of the text from the note.

Not sure why it displayed only the specified selection text at first and then later the entire note.

This is happening from a heading ![embed#like this]