[FIX] partner_autocomplete: avatar widget not clickable on mobile

Previously, in company form view, avatar was not clickable due to a
`block` div that was overlapping the avatar widget and preventing
clicking on it.

This commit fixes the issue by preventing the overlap and thus making
the image widget on company form clickable.

Note that another fix would be to remove `partner_gid` from the company
form view (it's already the case in 14.0).
In this case "oe_title" is directly followed by .o_form_view .oe_avatar
and a padding-right: 100px is applied:
.o_form_view .oe_avatar + .oe_title {
    padding-right: 100px;
}
However, considering stable version, changing fields position
should be avoided.

Task Id: 2231950

closes odoo/odoo#62631

Pr: #53798
X-original-commit: 6e684776
Signed-off-by: Adrien Dieudonné (adr) <adr@odoo.com>
Co-authored-by: D J <dja@odoo.com>

addons/partner_autocomplete/static/src/scss/partner_autocomplete.scss

 .o_field_partner_autocomplete.dropdown {
-    display: block;
-
     > .o_partner_autocomplete_dropdown .dropdown-item {
         min-width: 300px;
         padding: 4px 8px;