Hide upload button thru style options (#1491)

* Hide upload button

* Update CHANGELOG.md

CHANGELOG.md

@@ -7,20 +7,24 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 <!-- CHANGELOG line template
 ### Added/Changed/Removed
-- Added something, by [@johndoe](https://github.com/johndoe) in PR [#1435](https://github.com/Microsoft/BotFramework-WebChat/pull/XXX)
+- Added something, by [@johndoe](https://github.com/johndoe) in PR [#XXX](https://github.com/Microsoft/BotFramework-WebChat/pull/XXX)
 
 ### Fixed
-- Fix [#XXX](https://github.com/Microsoft/BotFramework-WebChat/issues/XXX). Patched something, by [@johndoe](https://github.com/johndoe) in PR [#1435](https://github.com/Microsoft/BotFramework-WebChat/pull/XXX)
+- Fix [#XXX](https://github.com/Microsoft/BotFramework-WebChat/issues/XXX). Patched something, by [@johndoe](https://github.com/johndoe) in PR [#XXX](https://github.com/Microsoft/BotFramework-WebChat/pull/XXX)
 -->
 
 ## [Unreleased]
-### Fixed
-- Fix [#1360](https://github.com/Microsoft/BotFramework-WebChat/issues/1360). Add roles to components of web chat by [@corinagum](https://github.com/corinagum) in PR [#1462](https://github.com/Microsoft/BotFramework-WebChat/pull/1462)
+### Added
+- Fix [#1383](https://github.com/Microsoft/BotFramework-WebChat/issues/1383). Added options to hide upload button, by [@compulim](https://github.com/compulim) in PR [#1491](https://github.com/Microsoft/BotFramework-WebChat/pull/1491)
 
+### Fixed
+- Fix [#1360](https://github.com/Microsoft/BotFramework-WebChat/issues/1360). Added `roles` to components of Web Chat, by [@corinagum](https://github.com/corinagum) in PR [#1462](https://github.com/Microsoft/BotFramework-WebChat/pull/1462)
 - Fix [#1409](https://github.com/Microsoft/BotFramework-WebChat/issues/1409). Added microphone status as screen reader only text, by [@corinagum](https://github.com/corinagum) in PR [#1490](https://github.com/Microsoft/BotFramework-WebChat/pull/1490)
-
 - Fix [#1605](https://github.com/Microsoft/BotFramework-WebChat/issues/1305), [#1316](https://github.com/Microsoft/BotFramework-WebChat/issues/1316), [#1341](https://github.com/Microsoft/BotFramework-WebChat/issues/1341), [#1411](https://github.com/Microsoft/BotFramework-WebChat/issues/1411). Fix color contrast ratios & downloadIcon narrator accessibility by [@corinagum](https://github.com/corinagum) in PR [#1494](https://github.com/Microsoft/BotFramework-WebChat/pull/1494)
 
+### Samples
+- UI: [Hide upload button](https://microsoft.github.io/BotFramework-WebChat/05.d.hide-upload-button-styling/), in [#1491](https://github.com/Microsoft/BotFramework-WebChat/pull/1491)
+
 ## [4.2.0] - 2018-12-11
 ### Added
 - Build: Development build now include instrumentation code, updated build scripts