fix: enable save button when re-ordering components or dynamic zones

[mathildeleg]

What does it do?

This PR resolves two issues in the Configure the View page:

1. Re-ordering components or dynamic zones didn't trigger the enabling of the Save button, despite the layout having changed.
2. Inability to drop an element not full-width as the first row of the layout.

Why is it needed?

When updating the layout of a content-type, by moving a field type Component or Dynamic Zone, the "Save" button was disabled, not allowing users to save their new layout.
BEFORE
https://github.com/user-attachments/assets/f57d9bb0-f340-44a2-a2e2-2370628132d7

AFTER
https://github.com/user-attachments/assets/8b0f1c21-1e96-4a18-870f-bb5fc12b91df

When updating the layout of a content-type, we couldn't drop an element of width smaller than 100% above the first row where the element has the full width, only in the row below.
BEFORE
https://github.com/user-attachments/assets/73ab303a-65bc-4bea-afce-698f001e23fa

AFTER
https://github.com/user-attachments/assets/a4071c9b-e3d7-48a5-9631-a23fc5a273c9

How to test it?

• Create a content type with at least one component or dynamic zone + a text field.
• Go to the "Configure the view" page for that component.
• Drag the component or dynamic zone and drop it in another spot in the layout.
  => The "Save" button should be enabled, allowing you to save your new layout.

• Create content type with at least two Text fields.
• Go to the "Configure the view" page for that component.
• Make the first Text field in the layout full width (100%) and the other 50%.
• Drag the 50% field and drop it above the 100% field.
• The layout should now be: 50% field on the first row, 100% on the second row.

Related issue(s)/PR(s)

Fixes #23161
Closes CMS-574

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[santicros]

Doing some manual testing, it is solving the issue of not being able to save correctly for me :)

[markkaylor]

Nice, looks good to me. Tested 🎈