message: Opt-in to window/progress in ProposedFeatures
diff: @@ -31,6 +31,7 @@ import { WorkspaceFoldersFeature } from './workspaceFolders';
  import { FoldingRangeFeature } from './foldingRange';
  import { DeclarationFeature } from './declaration';
  import { SelectionRangeFeature } from './selectionRange.proposed';
  +import { WindowProgressFeature } from './progress.proposed';
  import * as Is from './utils/is';
  import { terminate } from './utils/processes';
  @@ -510,7 +511,8 @@ export class SettingMonitor {
  export namespace ProposedFeatures {
  export function createAll(client: BaseLanguageClient): (StaticFeature | DynamicFeature<any>)[] {
  let result: (StaticFeature | DynamicFeature<any>)[] = [
  - new SelectionRangeFeature(client)
  + new SelectionRangeFeature(client),
  + new WindowProgressFeature(client)
  ];
  return result;
  }
  