Description:
If a document with hidden sections are merged as a single document the hidden sections are stripped form the document. This is the expected result. But if the document is merged as individual documents the hidden sections are present in the document. This is a bug.


Steps to Reproduce:
1. Create a document with this content (automatically numbered list)
  1. first element
  2. second element
  3. third element
2. Insert 3 sections
  -- 1st section
  1. first element
  -- 2nd section
  2. second element
  -- 3rd section
  3. third element
3. Create a mail merge database with some fields: Id, name and some boolean fields. For example:
  ID	Name	Item1	Item2	Istem3
  1	John	true	false	false
  2	Peter	false	true	true
  3	Paul	false	false	true
4. Add "hidden" condition to the all sections: Format > Sections > Hidden: 
  !HiddenDatabase.Sheet.Item1
  !HiddenDatabase.Sheet.Item2
  !HiddenDatabase.Sheet.Item3
5. Choose File > Print and respond with Yes in the message box. Create a merged file as a single document.
6. Choose File > Print and respond with Yes in the message box. Create merged files as individual documents.

Actual Results:
The file created with as a single document options: OK
The files created with option as individual documents: is fails. For example. The output is:

    Peter
    2. second element
    3. third element

Expected Results:
The expected result is:

    Peter
    1. second element
    2. third element


Reproducible: Always


User Profile Reset: No



Additional Info:
Why is the ouput for single document good?
- Open the document.
- See Format > Sections: There are no hidden sections. Only the visible sections are in the document structure. The sections are named in this way: MailMergeSection[datetime][original section name]
  
Why are ouputs for individual documents wrong?
- Open a document.
- See Format > Sections: All sections are present in the document structure and there are hidden sections!