Revert "Suppress native proxy icon on cmux main windows" - #4099

Bugbot Analysis Progress (5m 44s elapsed)

✅ Gathered PR context (3s)
✅ Completed bug detection (5m 40s)
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Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_2ccd4609-5ec2-4d59-9e6e-47c9e803a4b3