[IMP] web: Added log information to help fix errors from services.

A typo fix is added.
Fix error from loading xml while widget is destroyed. Now that the xml
templates are loaded in the bundle, the error appears more frequently.

Part-of: odoo/odoo#95500

addons/im_livechat/static/src/services/public_livechat_service.js

@@ -11,7 +11,9 @@ export const publicLivechatService = {
         return {
             mountLivechatButton() {
                 const livechatButton = new LivechatButton(rootWidget, messaging);
-                livechatButton.appendTo(document.body);
+                livechatButton.appendTo(document.body).catch(error => {
+                    console.info("Can't load 'LivechatButton' because:", error);
+                });
                 return livechatButton;
             },
         };

addons/web/static/lib/qweb/qweb2.js

@@ -267,7 +267,7 @@ QWeb2.Engine = (function() {
                     if (name && extend) {
                         // Clone template and extend it
                         if (!this.templates[extend]) {
-                            return this.tools.exception("Can't clone undefined template " + extend);
+                            return this.tools.exception("Can't clone undefined template '" + extend + "' to create '" + name + "'");
                         }
                         this.templates[name] = this.templates[extend].cloneNode(true);
                         this.extend_templates[name] = (this.extend_templates[extend] || []).slice();

addons/web/static/src/env.js

@@ -125,7 +125,7 @@ async function _startServices(env, toStart) {
                             })
                             .catch((error) => {
                                 services[name] = error;
-                                console.error(error);
+                                console.error("Can't load service '" + name + "' because:", error);
                             })
                             .finally(resolve);
                     })

addons/web_editor/static/src/js/editor/snippets.options.js

@@ -3865,7 +3865,7 @@ const SnippetOptionWidget = Widget.extend({
                 // widget start.
                 parentEl.removeChild(el);
 
-                if (widget.isContainer()) {
+                if (widget.isContainer() && !widget.isDestroyed()) {
                     return this._renderXMLWidgets(widget.el, widget);
                 }
             });

addons/website_slides/static/src/js/slides_course_quiz.js

@@ -831,4 +831,4 @@
 
     export var Quiz = Quiz;
     export var ConfirmationDialog = ConfirmationDialog;
-    export const websiteSlidesQuizNoFullscree = publicWidget.registry.websiteSlidesQuizNoFullscreen;
+    export const websiteSlidesQuizNoFullscreen = publicWidget.registry.websiteSlidesQuizNoFullscreen;