added the index page for the UI section

Author: Daniela Caicedo

design/user_interface/index.md

@@ -1,26 +1,23 @@
-# UI Components & Resources
+# User Interface
 
-Plugin UI Components & Resources will provide guidance around the different elements you can use to build a plugin UI. It covers everthing from styles to building a layout. For guidance around the design patterns and best practices refer to the [UX guidelines](../ux_guidelines/index.md).
+The user interface section will provide guidance around the different elements you can use to build a plugin UI. It covers everything from styles to building a layout. For guidance around the UX of a plugin and best practices refer to UX patterns.
 
 XD plugins can display UI in the form of modal dialogs, built with JavaScript and a supported subset of HTML and CSS.
 
 The tutorials contained in this section will give you an in-depth look at UI features available to your plugin through the API.
 
+----------
+### Documentation
 
-> [User Interface Components](/reference/ui/index.md)
-
-> [Resources - Sticker Sheet](./Sticker_sheet.md)
-
-## UI Components
 In this section you can see what styles you can use in the UI, how to build a modal layout and the UI elements you can use.
 
-**Styles** - in this section you can learn more about rich styling options in your user interface through a combination of CSS and various classes that are defined for you.
+- **Styles** - in this section you can learn more about rich styling options in your user interface through a combination of CSS and various classes that are defined for you.
+
+- **Layout** - learn about the layout modes supported by the XD user interface APIs
 
-**Elements** - see what elements are fundamental to your user interface.
+- **Elements** - see what elements are fundamental to your user interface.
 
-**Layout** - learn about the layout modes supported by the XD user interface APIs 
+- **Building a modal** - a modal dialog is used to display important information and ask for user input. XD Plugins can display user interface in the form of modal dialogs.
 
-**Modal** - a modal dialog is used to display important information and ask for user input. XD Plugins can display user interface in the form of modal dialogs.
+- **Design GitHub Repo** - Use the sticker sheet to design your plugin in XD.
 
-## Resources
-Use the sticker sheet to design your plugin in XD.