src/vs/workbench/contrib/preferences/browser/preferencesRenderers.ts/EditSettingRenderer/getDefaultActions
class EditSettingRenderer:	private getDefaultActions(setting: IIndexedSetting): IAction[] {
		if (this.isDefaultSettings()) {
			const settingInOtherModel = this.associatedPreferencesModel.getPreference(setting.key);
			return [<IAction>{
				id: 'setDefaultValue',
				label: settingInOtherModel ? nls.localize('replaceDefaultValue', "Replace in Settings") : nls.localize('copyDefaultValue', "Copy to Settings"),
				enabled: true,
				run: () => this.updateSetting(setting.key, setting.value, setting)
			}];
		}
		return [];
	}