Changed <br> to get a consistent overlay-pdf form

[DrSommer20]

Description

Edited the HTML for overlay-pdf to get a consistent look. Repaired the missing overlay-pdfs.counts.label to be displayed and not deleted on change

Closes #1831

Checklist

• [ X] I have read the Contribution Guidelines
• [ X] I have performed a self-review of my own code
• [ X] I have commented my code, particularly in hard-to-understand areas
• [ X] My changes generate no new warnings
• [ X] I have read the section Add New Translation Tags (for new translation tags only)