Warn when opening in browser but not properly authenticated on host device

[rosszurowski]

We have a button that allows users to open a container directly in their browser. We also have a warning that appears when their host device and Docker extension aren't on the same Tailscale network.

However, it's easy to start to ignore the big warning and treat it as a header. Perhaps we can display it less prominently in most cases, and instead prompt them in contextually relevant places. For example, when pressing "open in browser," maybe we can have a dialog that warns them that they won't be able to open the link before we pop them off to their browser?