Part of #81388

Part of #81388

Part of https://github.com/microsoft/vscode-remote-release/issues/1777 and https://github.com/microsoft/vscode/issues/81388

fixes #83743

Fix #85722

* Fixes more node 12 typing errors

For #82514

* Remove Symbol.toStringTag usage for now

* Reverting a few fixes that are not comptible with current node typings

* Revert one more use of StringDecoder

Must wait until we actually pick up the new typings

If multiple instances of the same  custom editor are opened for the same resource, the edit stack should be shared between them. This matches how we work with text files

For #85160

Summary:
Address issue #73904 by adding an optional `sortByLabel` to the QuickPick class which determines whether the picker re-sorts the result list when the user types in the input field.

If true, the picker applies a sort to order results by the index of the first appearance of the input in the label.

For backwards compatibility, this field is true by default.

https://github.com/microsoft/vscode/issues/73904

Test Plan:
attached video shows behavior both before and after

{F167292605}

note: there aren't any existing tests on what happens when the query input changes in the QuickPick

Reviewers: dalongi, ericblue, hchau

Reviewed By: ericblue

Differential Revision: https://phabricator.intern.facebook.com/D16203434

Signature: 16203434:1562878837:5413e3852f2bd04c8e81b9fe5c4a08127dfe3b65

For #77131

This reverts commit 544b0abf.

This currently is not connected to any actual actions in the editor

Fixes #63052

Fixes #62103

This documents the current thinking on the custom editor api. The current api proposal is not actually implemented yet

Preserve comment thread collapse state across extension host update messages, fixes https://github.com/microsoft/vscode-pull-request-github/issues/1400

Part of #81574