[Full page editing] Lost nodetype when deleting line

[leliahel]

Steps to reproduce

Go to ​http://ckeditor.com/demo#full-page
Insert new title, say h1.
Newline, another title, say h2.

You should have the following:

First line

Second line

Now delete the first line and delete the line break.

You should now have:

Second line

But instead we got:

Second line

Which is not the expected behavior.

[leliahel]

Fail submit