The purpose of this commit is to improve the domain selector UX with multiple little changes: - The model field selector popover is now autofocused when opened - Removal of a div that appeared during a hover on "add leaf" and "ellipsis button" - Caret icon next to the root node selector - Minor CSS changes task-2861497 closes odoo/odoo#99321 Signed-off-by: Géry Debongnie <ged@odoo.com>