[4.0] Frontend: Normalise List contacts

[infograf768]

Summary of Changes

As was done in
#30868 (merged)
and #30981
this PR takes off the fieldset and the input title

Display difference: Limit box will now display to the right.

Testing Instructions

Create multiple contacts in the same category.
Create a List Contacts in a Category menu item for this category.
Make sure Filter Field is set to Show in the menu parameters.
Display the menu item in frontend.

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

[chmst]

I have tested this item ✅ successfully on c5587b0

On code inspect, it is a known construction.

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[jwaisner]

I have tested this item ✅ successfully on c5587b0

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[jwaisner]

RTC

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