Added separate Apple Silicon and Intel download links.

Added a web page to download the application.

Added a download app card in the sidebar.

Fixes

• Fixed an issue where all sessions would end after logging out of one of the sessions.

• Fixed an issue where date badges would not display correctly in chat.

• Fixed an issue where some chats had mis-formatted dates causing the app to crash.

• Fixed an issue where Quick Ask would display the login screen.