[feature] Add env var to show/hide Chat History Button#771

iseabock merged 3 commits intomainmicrosoft/sample-app-aoai-chatGPT:mainfrom

NO-TASK-env-var-to-show-hide-chat-history-buttonmicrosoft/sample-app-aoai-chatGPT:NO-TASK-env-var-to-show-hide-chat-history-buttonCopy head branch name to clipboard