[FIX] point_of_sale: more info of partner

When you are eon the details form of partner in POS UI, you have a
button 'More Info' that redirect you to the backend partner form. This
button is always displayed and can lead to a traceback if you are
clikcing on it while creating a new partner.

To avoid such issues, we are only display the button when we are
editing existing partners

closes odoo/odoo#92967

Signed-off-by: Masereel Pierre <pim@odoo.com>

addons/point_of_sale/static/src/xml/Screens/PartnerListScreen/PartnerListScreen.xml

@@ -22,7 +22,7 @@
                         <t t-if="!env.isMobile"> Discard</t>
                     </div>
                     <div class="top-right-buttons">
-                    <div t-if="state.detailIsShown" class="button more-info">
+                    <div t-if="state.detailIsShown &amp;&amp; state.editModeProps.partner.id" class="button more-info">
                         <a t-att-href="partnerLink" target="_blank"> More info</a>
                     </div>
                     <div class="search-bar-container sb-partner" t-if="!state.detailIsShown">