Fixes Issue #217 - chat is reversed by default

[jmatthiesen]

Purpose

Fixes #217 - new chat messages are reversed / post at the top of the page by default.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

Launch the application and post 2 chat messages in a chat channel. Notice that messages go from top to bottom now. As new chat messages are added, they're appended to the end of the chat.

Detail steps:

• Open the code in Codespaces
• run azd up from the root directory
• Open the URL for the deployed app, test using the above description

What to Check

As new chat messages are posted, they are added beneath previous chat messages.

[luisquintanilla]

LGTM. Thanks @jmatthiesen