VSCode merge (#4610)

* Merge from vscode e388c734f30757875976c7e326d6cfeee77710de

* fix yarn lcoks

* remove small issue

.vscode/launch.json

@@ -211,6 +211,13 @@
 				"Launch azuredatastudio",
 				"Attach to Extension Host"
 			]
-		}
+		},
+		{
+			"name": "Debug Unit Tests",
+			"configurations": [
+				"Attach to VS Code",
+				"Run Unit Tests"
+			]
+		},
 	]
 }

.vscode/tasks.json

@@ -28,23 +28,6 @@
 				}
 			}
 		},
-		{
-			"type": "npm",
-			"script": "strict-null-check-watch",
-			"label": "TS - Strict Null Checks",
-			"isBackground": true,
-			"presentation": {
-				"reveal": "never"
-			},
-			"problemMatcher": {
-				"base": "$tsc-watch",
-				"owner": "typescript-strict-null",
-				"applyTo": "allDocuments"
-			},
-			"runOptions": {
-				"runOn": "folderOpen"
-			}
-		},
 		{
 			"type": "gulp",
 			"task": "tslint",
@@ -86,4 +69,4 @@
 			"problemMatcher": []
 		}
 	]
-}
+}