Removed bubble user background color. Leave it to default option (#2067)

* Removed bubble user background color. Leave it to default option

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 
 ## Added
-- [client/main] Added Ngrok Debugger UI in PR [2032](https://github.com/microsoft/BotFramework-Emulator/pull/2032)
+- [client/main] Added Ngrok Status Viewer in PR [2032](https://github.com/microsoft/BotFramework-Emulator/pull/2032)
 - [client/main] Changed conversation infrastructure to use Web Sockets to communicate with Web Chat in PR [2034](https://github.com/microsoft/BotFramework-Emulator/pull/2034)
 
 ## Changed
@@ -16,6 +16,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Removed
 - [client/main] Removed legacy payments code in PR [2058](https://github.com/microsoft/BotFramework-Emulator/pull/2058)
 
+## Fixed
+- [client] Removed buble background on attachments [2067](https://github.com/microsoft/BotFramework-Emulator/pull/2067)
+
 ## v4.7.0 - 2019 - 12 - 13
 ## Fixed
 - [client] Added an empty state for the recent bots submenu in the app menu for Windows in PR [1945](https://github.com/microsoft/BotFramework-Emulator/pull/1945)

packages/app/client/src/ui/editor/emulator/parts/chat/webChatTheme.ts

@@ -38,7 +38,6 @@ export default {
   primaryFont: 'var(--default-font-family)',
 
   bubbleBackground: 'var(--webchat-bubble-bg)',
-  bubbleFromUserBackground: 'var(--webchat-user-bubble-bg)',
   bubbleFromUserTextColor: 'var(--webchat-user-bubble-text)',
   bubbleTextColor: 'var(--webchat-bubble-text)',
   bubbleMinHeight: 20,