Merge #3024

3024: vscode: eliminate floating promises and insane amount of resource handle leaks r=matklad a=Veetaha

Khm, yeah ...

Co-authored-by: Veetaha <gerzoh1@gmail.com>

editors/code/src/config.ts

@@ -45,7 +45,7 @@ export class Config {
     private prevCargoWatchOptions: null | CargoWatchOptions = null;
 
     constructor(ctx: vscode.ExtensionContext) {
-        vscode.workspace.onDidChangeConfiguration(_ => this.refresh(), ctx.subscriptions);
+        vscode.workspace.onDidChangeConfiguration(_ => this.refresh(), null, ctx.subscriptions);
         this.refresh();
     }