Restart language server automatically instead of asking user to reload

[stamblerre]

Minimize the number of instances where we ask the user to reload their VS Code window.
There are still a few more places where this command could be improved.

Updates microsoft/vscode-go#2607.

[gopherbot]

This PR (HEAD: 95c38f7) has been imported to Gerrit for code review.

Please visit https://go-review.googlesource.com/c/vscode-go/+/222418 to see it.

Tip: You can toggle comments from me using the comments slash command (e.g. /comments off)
See the Wiki page for more info

[gopherbot]

This PR (HEAD: 5bc3c1a) has been imported to Gerrit for code review.

Please visit https://go-review.googlesource.com/c/vscode-go/+/222418 to see it.

Tip: You can toggle comments from me using the comments slash command (e.g. /comments off)
See the Wiki page for more info

[gopherbot]

This PR (HEAD: 125fb19) has been imported to Gerrit for code review.

Please visit https://go-review.googlesource.com/c/vscode-go/+/222418 to see it.

Tip: You can toggle comments from me using the comments slash command (e.g. /comments off)
See the Wiki page for more info

[gopherbot]

Message from Hyang-Ah Hana Kim:

Patch Set 4:

(3 comments)

fyi the ci run succeeded (https://github.com/golang/vscode-go/pull/3/checks?check_run_id=502206526)

---

Please don’t reply on this GitHub thread. Visit golang.org/cl/222418.
After addressing review feedback, remember to publish your drafts!