consistent indentation for ChatWindow.ts
consistent indentation for ChatWindow.ts

ahmadassaf/Angular-RxJS-Chat,ahmadassaf/Angular-RxJS-Chat,ng-book/angular2-rxjs-chat,ahmadassaf/Angular-RxJS-Chat,ng-book/angular2-rxjs-chat,ng-book/angular2-rxjs-chat,ng-book/angular2-rxjs-chat