FIx fieldsets overlapping when using Gin admin theme

May I suggest a CSS update that solves the problem? Since the fieldsets are being displayed as `display: flex`, just add a gap.

paragrapghs_broswer/css/paragraphs_broswer.css
line 27:
.paragraphs-browser-wrapper .form-wrapper {
display: flex;
flex-wrap: wrap;
gap: 48px 0;
}
line 33

My first diff patch with the CSS change of adding a gap to the `.paragraphs-broswer-wrapper .form-wrapper`.

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The problem is that the fieldset contents are not positioned correctly within their parent container:
* Patch #5 just pushes the next row down but doesn't fix the positioning.
* Patch #8 moves the next row down but again doesn't fix the positioning.

This makes a few minor changes, but doesn't fix it completely.
* Some spacing is added between the rows, ala #8, but it's reduced to 30px instead of 48.
* The buttons are displayed inside the box.
* The spacing is tightened up a little bit.

The fieldset legend still displays over the top border, which IMHO doesn't look as good.

I found another solution for this issue, please review it.

Please check it, I added new changes

#13 is working.

#13 works and displays the buttons inside the fieldset. It feels not completed yet. Can we discuss another solution for this maybe?