Rendered output is corrupted when not scrolled

[orhun]

This something that I experienced while working on #150

This is how the markdown is rendered when set_scroll is not called:

It is fixed when I add this line:

https://github.com/orhun/md-tui/blob/75ff3bbe1af19056a0ce61e6b4824b4dfda3a49b/examples/demo.rs#L85

Which makes me think, maybe we should call this method somewhere internally just to make sure that render isn't corrupted?

Or we can get to the bottom of this and figure out something else 🤔

[orhun]

damn we're pwned