Save the data in Generate XML

[AsaArrhen]

Describe the bug
The text you write in the tab Generate XML is not saved and has disappeared the next time you get to it

To Reproduce
Steps to reproduce the behavior:

1. Go to Admin PxWeb
2. Click on 'Tools/Generate XML'
3. Fill in text
4. Close and go back
5. The text is gone

Expected behavior
The text you add is saved

PxWeb 2022v1

[Jonathan Erikson]

Fixed with #386