Merge from vscode a348d103d1256a06a2c9b3f9b406298a9fef6898 (#15681)

* Merge from vscode a348d103d1256a06a2c9b3f9b406298a9fef6898

* Fixes and cleanup

* Distro

* Fix hygiene yarn

* delete no yarn lock changes file

* Fix hygiene

* Fix layer check

* Fix CI

* Skip lib checks

* Remove tests deleted in vs code

* Fix tests

* Distro

* Fix tests and add removed extension point

* Skip failing notebook tests for now

* Disable broken tests and cleanup build folder

* Update yarn.lock and fix smoke tests

* Bump sqlite

* fix contributed actions and file spacing

* Fix user data path

* Update yarn.locks

Co-authored-by: ADS Merger <karlb@microsoft.com>

test/unit/README.md

@@ -8,6 +8,7 @@ All unit tests are run inside a electron-browser environment which access to DOM
 
 - use the `--debug` to see an electron window with dev tools which allows for debugging
 - to run only a subset of tests use the `--run` or `--glob` options
+- use `yarn watch` to automatically compile changes
 
 For instance, `./scripts/test.sh --debug --glob **/extHost*.test.js` runs all tests from `extHost`-files and enables you to debug them.
 
@@ -24,7 +25,7 @@ Unit tests from layers `common` and `browser` are run inside `chromium`, `webkit
 
 ## Run (with node)
 
-	yarn run mocha --run src/vs/editor/test/browser/controller/cursor.test.ts
+	yarn run mocha --ui tdd --run src/vs/editor/test/browser/controller/cursor.test.ts
 
 
 ## Coverage