[FIX] point_of_sale: correctly block ui when sending RPC

Before this commit, the block UI component was not visible so the interface
was not blocked when sending RPC (at least).

After this commit, the block UI works correctly

closes odoo/odoo#72727

Signed-off-by: Géry Debongnie (ged) <ged@openerp.com>

addons/point_of_sale/__manifest__.py

@@ -168,6 +168,9 @@
             ('remove', 'web/static/src/core/errors/error_handlers.js'),
             ('remove', 'web/static/src/legacy/legacy_rpc_error_handler.js'),
         ],
+        'point_of_sale.pos_assets_backend_style': [
+            "web/static/src/core/ui/**/*.scss",
+        ],
         'point_of_sale.tests_assets': [
             'web/static/lib/daterangepicker/daterangepicker.css',
             'web/static/lib/qunit/qunit-2.9.1.css',

addons/point_of_sale/static/src/js/chrome_adapter.js

@@ -8,8 +8,7 @@ import { configureGui } from "point_of_sale.Gui";
 import { useBus } from "@web/core/bus_hook";
 import PosComponent from "point_of_sale.PosComponent";
 import PopupControllerMixin from "point_of_sale.PopupControllerMixin";
-import { useErrorHandlers } from "point_of_sale.custom_hooks";
-import { ConnectionLostError } from "@web/core/network/rpc_service";
+import { registry } from "@web/core/registry";
 
 function setupResponsivePlugin(env) {
     const isMobile = () => window.innerWidth <= 768;
@@ -32,7 +31,11 @@ export class ChromeAdapter extends PopupControllerMixin(PosComponent) {
         useBus(this.env.qweb, "update", () => this.render());
         const chrome = owl.hooks.useRef("chrome");
         owl.hooks.onMounted(async () => {
+            // Little trick to avoid displaying the block ui during the POS models loading
+            const BlockUiFromRegistry = registry.category("main_components").get("BlockUI");
+            registry.category("main_components").remove("BlockUI");
             await chrome.comp.start();
+            registry.category("main_components").add("BlockUI", BlockUiFromRegistry);
             configureGui({ component: chrome.comp });
             setupResponsivePlugin(this.env);
         });

addons/point_of_sale/views/pos_assets_common.xml

@@ -2,6 +2,7 @@
 <odoo>
 
 <template id="point_of_sale.assets_common" name="POS Assets Common">
+    <t t-call-assets="point_of_sale.pos_assets_backend_style" t-js="false"/>
     <t t-call-assets="point_of_sale.assets" t-js="false" />
     <t t-call-assets="web.assets_common" t-css="false" />
     <t t-call-assets="point_of_sale.pos_assets_backend" t-css="false" />