Update user agent generation

[nleush]

About the changes

• Changes to existing functionality (improvements or deprecations)

What has changed

Please describe what the code is doing (in this repo):

• Update user agent generation - add (+app-url)

Checklist

• I have performed a self-review of my code, including Files Changed view
• Fix/feat branches in all related repos are named the same
• All related PRs are submitted
• Task is DONE and links back to this PR or no task

Review

Please note any risks, caveats, migration steps, release notices or additional tasks.

• PRs have been tested on staging by DEV
• PRs have been tested on staging by QA
• PRs have been tested on staging by PRODUCT

Please describe the tests and give additional instructions if required, add screenshots and links if necessary.