src/vs/workbench/services/progress/browser/progressIndicator.ts/ScopedProgressIndicator/registerListeners
class ScopedProgressIndicator:	registerListeners() {
		this._register(this.scope.onDidChangeActive(() => {
			if (this.scope.isActive) {
				this.onDidScopeActivate();
			} else {
				this.onDidScopeDeactivate();
			}
		}));
	}