Update readmes

Author: RomanTsukanov

README.md

@@ -3,9 +3,6 @@
 [![](https://img.shields.io/badge/Open_in_DevExpress_Support_Center-FF7200?style=flat-square&logo=DevExpress&logoColor=white)](https://supportcenter.devexpress.com/ticket/details/T945799)
 [![](https://img.shields.io/badge/📖_How_to_use_DevExpress_Examples-e9f6fc?style=flat-square)](https://docs.devexpress.com/GeneralInformation/403183)
 <!-- default badges end -->
-# getting-started-with-dropdownbutton
-<!-- run online -->
-**[[Run Online]](https://codecentral.devexpress.com/309685103/)**
-<!-- run online end -->
+# Getting Started with DevExtreme DropDownButton
 
-This repository stores the source code for the [Getting Started with DropDownButton](https://js.devexpress.com/Documentation/Guide/Widgets/DropDownButton/Getting_Started_with_DropDownButton/) tutorial.
+This repository stores the source code for the [Getting Started with DropDownButton](https://js.devexpress.com/Documentation/Guide/UI_Components/DropDownButton/Getting_Started_with_DropDownButton/) tutorial.

angular/README.md

@@ -1,4 +1,6 @@
-# GettingStartedWithDropdownbutton
+# Getting Started with DevExtreme Angular DropDownButton
+
+This repository stores Angular source code for the [Getting Started with DropDownButton](https://js.devexpress.com/Documentation/Guide/UI_Components/DropDownButton/Getting_Started_with_DropDownButton/) tutorial.
 
 This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 10.2.0.
 

config.json

@@ -1,4 +1,4 @@
 {
   "autoGenerateVb": false,
-  "runOnWeb": true
+  "runOnWeb": false
 }

jquery/README.md

@@ -0,0 +1,5 @@
+# Getting Started with DevExtreme jQuery DropDownButton
+
+This repository stores jQuery source code for the [Getting Started with DropDownButton](https://js.devexpress.com/Documentation/Guide/UI_Components/DropDownButton/Getting_Started_with_DropDownButton/) tutorial.
+
+To launch the project, open `index.html` with your browser.

react/README.md

@@ -1,4 +1,6 @@
-# Getting Started with Create React App
+# Getting Started with DevExtreme React DropDownButton
+
+This repository stores React source code for the [Getting Started with DropDownButton](https://js.devexpress.com/Documentation/Guide/UI_Components/DropDownButton/Getting_Started_with_DropDownButton/) tutorial.
 
 This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
 

vue/README.md

@@ -1,4 +1,6 @@
-# getting-started-with-dropdownbutton
+# Getting Started with DevExtreme Vue DropDownButton
+
+This repository stores Vue source code for the [Getting Started with DropDownButton](https://js.devexpress.com/Documentation/Guide/UI_Components/DropDownButton/Getting_Started_with_DropDownButton/) tutorial.
 
 ## Project setup
 ```