ab42174653
3131: vscode: simplified config and to removed one source of truth of default values r=matklad a=Veetaha Though not intended initially, the implementation of config design is alike [dart's one](https://github.com/Dart-Code/Dart-Code/blob/master/src/extension/config.ts) as pointed by @matklad in PM. Co-authored-by: Veetaha <gerzoh1@gmail.com>
