This is both more correct in terms of what it does and also fixes an
issue where you couldn't navigate to the diff preview with the
keyboard previously.
It looks exactly the same as before except there's an additional
paddingless button when you hover/focus it.
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Implements the Advanced Playground Table
## About the changes
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Closes #
[1-1007](https://linear.app/unleash/issue/1-1007/env-aware-results-table)
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### Important files
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Signed-off-by: andreas-unleash <andreas@getunleash.ai>
