The header format was not present in the object, because the header
format is just added to the hidden character after the header itself.
To fix the problem, the format is added manually.

- removed unused code
- adding todos for the class

added second hidden editor, so editor is visible all the time and also
improve implementation to set the correct text to quill

the statusbar toggled each time, if an annotation was created. Now it is just toggled the first time.

The status bar now toggle if an annotation property is marked in the document.