[DocumentViewer] Print prompt reappear as many times as many pdf files were opened

Linux Ubuntu 22.04.3 LTS

Qt Creator 11.0.3

Steps to reproduce:

1. Open and run document viewer example
2. Open first pdf file.
3. Click on print button and cancel.
4. Open second pdf file.
5. Click on print button and cancel.
6. Open third pdf file.
7. Click on print button and cancel.

Expected:  Print window should disappear and not reappear.

Actual: Print prompt appears appear again after clicking cancel (or print). It appears multiple times depends how many files were opened. Sometimes the app freezes for a long time when following above steps.

Reproducibility:  100%