This wraps the inner-content of the Site Health dashboard widget to give a unique target for CSS selectors, restoring the ability to collapse the widget.
The initial implementation targeted the `.inside` class used by all widgets to apply styling to the widget content, but this prevented the widget from being collapsed, as it added grid-styles which other widgets do not use, overriding the usual behavior when toggling widget visibility.
Follow-up to [50833].
Props alanjacobmathew, walbo.
Fixes#53521.
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