Fixed accessibility issue with bot state inspector buttons

* show hide and arrows as buttons

* Update changelog with new issue resolved

* Update changelog with issue solved

* Add new line at end of changelog

CHANGELOG.md

@@ -35,9 +35,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - [1835](https://github.com/microsoft/BotFramework-Emulator/pull/1835)
   - [1836](https://github.com/microsoft/BotFramework-Emulator/pull/1836)
   - [1838](https://github.com/microsoft/BotFramework-Emulator/pull/1838)
+  - [1840](https://github.com/microsoft/BotFramework-Emulator/pull/1840)
   - [1843](https://github.com/microsoft/BotFramework-Emulator/pull/1843)
+
 - [client] Fixed an issue with the transcripts path input inside of the resource settings dialog in PR [1836](https://github.com/microsoft/BotFramework-Emulator/pull/1836)
 
+
 ## v4.5.2 - 2019 - 07 - 17
 ## Fixed
 - [client] Fixed some minor styling issues with the JSON inspector in PR [1691](https://github.com/microsoft/BotFramework-Emulator/pull/1691)

packages/app/client/src/ui/editor/emulator/parts/inspector/inspector.scss

@@ -17,7 +17,7 @@
       background-color: transparent;
       position: relative;
 
-      &:after {
+      &:after, &:before {
         content:'';
         border: 1px solid var(--p-button-bg);
         position: absolute;