Refactor use of navigator.userAgent

[takesson]

From Browser console:
"A page or script is accessing at least one of navigator.userAgent, navigator.appVersion, and navigator.platform. Starting in Chrome 101, the amount of information available in the User Agent string will be reduced.

To fix this issue, replace the usage of navigator.userAgent, navigator.appVersion, and navigator.platform with feature detection, progressive enhancement, or migrate to navigator.userAgentData."

Some usages of navigator.userAgent might be related to IE which no longer needs to degrade gracefully, in my opinion.