[Bug] - Alert is broken in glass mode #930

Description

Alert incorrectly has transparency in glass mode:

Steps to Reproduce

1. Go to https://www.patternfly.org/extensions/chatbot/messages/demo/attach-via-upload-button-in-message-bar/
2. Turn on glass mode
3. Drag a file into the ChatBot
4. Alert will show - transparency is off

Data/JSON Context (if applicable)

No response

Environment

No response

Screenshots or Logs

No response

Jira Issue: FELT-4665