The purpose of this commit is to improve the design of the Property field
modal as it was done to release something fast.
We also introduce a modification of the JS test related to the property
header. Before this commit, the structure of the modal was composed
of a header and a body.
Since we refactored the component in one single block with the class
`.o_modal_container`, we apply the `.o_field_property_definition_header`
class directly on the input rather than targeting an input inside the
header.
task-3084756
closesodoo/odoo#126274
X-original-commit: 12a25449d9f26aec5f14482952ca0db40bf612b9
Related: odoo/enterprise#43091
Signed-off-by: Warnon Aurélien (awa) <awa@odoo.com>