Code Insights: Voice-over doesn't announce that insight was deleted

Created by: vovakulikov

Steps to reproduce:

1. Go to the dashboard page and turn on voice over
2. Navigate to the delete insight modal
3. Click the delete forever button
4. See (hear) no announcement about just deleted insight

Expected behavior:

When we delete insight we should hear announcements about it and also move focus to the dashboard (or next insight card element in the dashboard)