[FIX] web_editor: fix onChange event

Ensure the `onChange()` callback is called
after each history steps in the editor.

Call the `_doAction()` directly, to avoid using the
disabled `_doDebouncedAction()`.

task-2760436

closes odoo/odoo#89339

X-original-commit: 18eaabcb4dab4682e3a94e16dbe66ff3c6f35a77
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>
Signed-off-by: Geelen Sébastien (sge) <sge@odoo.com>

addons/web_editor/static/lib/odoo-editor/src/OdooEditor.js

@@ -489,7 +489,6 @@ export class OdooEditor extends EventTarget {
             this.observer = new MutationObserver(records => {
                 records = this.filterMutationRecords(records);
                 if (!records.length) return;
-                this.dispatchEvent(new Event('contentChanged'));
                 clearTimeout(this.observerTimeout);
                 if (this._observerTimeoutUnactive.size === 0) {
                     this.observerTimeout = setTimeout(() => {
@@ -722,6 +721,7 @@ export class OdooEditor extends EventTarget {
         this._checkStepUnbreakable = true;
         this._recordHistorySelection();
         this.dispatchEvent(new Event('historyStep'));
+        this.dispatchEvent(new Event('contentChanged'));
         this.multiselectionRefresh();
     }
     // apply changes according to some records

addons/web_editor/static/src/js/backend/field_html.js

@@ -465,7 +465,7 @@ var FieldHtml = basic_fields.DebouncedField.extend(TranslatableFieldMixin, {
      * @param {OdooEvent} ev
      */
     _onChange: function (ev) {
-        this._doDebouncedAction.apply(this, arguments);
+        this._doAction();
     },
     /**
      * Allows Enter keypress in a textarea (source mode)