This fixes a display issue that prevented users from selecting fields when setting conditional visibility on one-to-many fields in Studio. Users can now access the field selector as expected, making form customization smoother and less frustrating.

previously when we click on the conditional visibility of one2many field,
we were unable to access the field selector due to overlay issue

in this commit we have changed the z-index value to fix the above issue.

Task 2187354

Custom backgrounds on the Odoo home screen now stay centered and are cropped appropriately on smaller screens. This prevents stretched images and gives users a cleaner, more consistent visual experience across devices.

Pad: https://pad.odoo.com/p/r.78f247cd2c20df951ac33e45387a0c7a
Task: https://www.odoo.com/web#id=1997621&action=327&model=project.task&view_type=form&menu_id=4720