The settings on the [Device Settings] restore to the default after printing a job / submitting a file printing

[szlt5]

Describe the bug
The settings on the [Device Settings] restore to the default after printing a job or submitting a file for printing.

To Reproduce
Steps to reproduce the behavior:

1. Install ps-printer-app by command snap install ps-printer-app
2. On the web localhost:8000, add a printer.
3. On the [Device Settings] tab, do some change.
4. Submit a file for printing by command $ps-printer-app submit testpage.ps
5. The settings on the [Default Settings] restore to the default ones.

Expected behavior
The settings on the [Default Settings] should not change.

System Information:

• OS: Unbuntu 23.10
• Browser: Firefox
• Version: ps-printer-app 20230715-1

Additional context
The ppdMarkDefaults() is invoked in the _prCreateJobData()