refactor: remove arrow from user icon

[dated]

Summary

https://app.clickup.com/t/egz63d

Checklist

• My changes look good in both light AND dark mode
• The change is not hardcoded to a single network, but has multi-asset in mind
• I checked my changes for obvious issues, debug statements and commented code
• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[ItsANameToo]

in MSQ designs we give the avatar a blue highlight when the dropdown is open, shouldn't the same be done in DW 🤔