Fix XSS vulnerability after PDF export (issue #3178)

[AWolf81]

Description

Disabled Javascript in the hidden printout electron window. We're currently not using Javascript in that Window, so it's OK to disable it.

If we would require JS later, we could also do sandboxing. But disabling is OK for now.

Issue fixed

#3178

Type of changes

• 🔘 Bug fix (Change that fixed an issue)
• ⚪ Breaking change (Change that can cause existing functionality to change)
• ⚪ Improvement (Change that improves the code. Maybe performance or development improvement)
• ⚪ Feature (Change that adds new functionality)
• ⚪ Documentation change (Change that modifies documentation. Maybe typo fixes)

Checklist:

• 🔘 My code follows the project code style
• ⚪ I have written test for my code and it has been tested
• 🔘 All existing tests have been passed
• ⚪ I have attached a screenshot/video to visualize my change if possible

[ZeroX-DG]

Works fine on my machine 🎉