chat bubbles for requests

[justschen]

cc. @kkbrooks @roblourens

[vs-code-engineering[bot]]

⚠️ This PR originates from a fork. Due to security restrictions, pipelines from forks are no longer triggered automatically. Learn more.

If the changes appear safe, you can manually trigger the pipeline by commenting /AzurePipelines run.

[roblourens]

Is it expected that the Undo Requests button is on the right?

[justschen]

i changed it to the left since if it was on the right, the header would move, or it would have a weird shift when hovered over to show the x button

[roblourens]

That makes sense, but the left feels unexpected too 🤷

[justschen]

yeahhhh it's probably more of a temporary solution - i personally think it should be in the toolbar at the bottom (especially since we'll be removing that header with the new one eventually, so having that undo requests there would be weird)