Fix toggle cards css and open/close them when clicked.

[Garfounkel]

I noticed the toggle cards from the Ghost editor were not displaying correctly and would not open or close. This PR fixes that.

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🔍 Inspect: https://vercel.com/styxlab/next-cms-ghost/7G2QAksnosinoBsC5qvrgXakGJf2
✅ Preview: https://next-cms-ghost-git-fork-garfounkel-toggle-fix-styxlab.vercel.app

[Garfounkel]

No problem! Totally make sense and I understand why it can't be merged in the current state.

[styxlab]

Closing for now, as I won't touch the style system any time soon. I might revisit this proposal if requested by more users.