[FIX] account_reconciliation_widget: m2x record keyboard navigation

We couldn't  use our direction keys to go down the record list on a
many2one field as the navigation events are propagated from the field it
self and go up to the widget where a navigation through the reconcile
keys is expected.

Both behaviors are preserved.

TT45219

account_reconciliation_widget/static/src/js/reconciliation/reconciliation_action.js

@@ -50,6 +50,13 @@ odoo.define("account.ReconciliationClientAction", function (require) {
         }),
 
         _onNavigationMove: function (ev) {
+            const $input = ev.target.$input;
+            // When we're on a relational field, we want to navigate inside the record
+            // selector, otherwise we'll be catching a wrong navigation event
+            if ($input && $input.hasClass("ui-autocomplete-input")) {
+                ev.stopPropagation();
+                return;
+            }
             var non_reconciled_keys = _.keys(
                 // eslint-disable-next-line no-unused-vars
                 _.pick(this.model.lines, function (value, key, object) {