Dismiss test output

**Is your feature request related to a problem? Please describe.**
When the test output is on screen, it takes up a lot of space.

**Describe the solution you'd like**
An 'x' to dismiss the test results

The issue names no file, test, or entry point. Start by locating the frontend component that displays test output and inspect how that panel is shown. Done means an “x” is available on the test-results view and dismisses the output without affecting the rest of the application.

Written by the indexing model from the issue text.