[FIX] web_editor: dynamic placeholder bug

The dynamic placeholder result was not added in the
editable dom in some situation. When the editor was
in rollback mode `true` after a `commitChange`
( maybe because of a `_toInline` called) the result
of the dynamic placeholder was rollback.

task-3044924

closes odoo/odoo#104343

X-original-commit: e9bd4f020ff4a5dd4240fde9caef0bded9a2e28c
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>
Signed-off-by: Geelen Sébastien (sge) <sge@odoo.com>

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

@@ -354,10 +354,13 @@ export class HtmlField extends Component {
     async commitChanges({ urgent } = {}) {
         if (this._isDirty() || urgent) {
             if (this.wysiwyg) {
+                // Avoid listening to changes made during the _toInline process.
+                this.wysiwyg.odooEditor.observerUnactive('commitChanges');
                 await this.wysiwyg.saveModifiedImages();
                 if (this.props.isInlineStyle) {
                     await this._toInline();
                 }
+                this.wysiwyg.odooEditor.observerActive('commitChanges');
             }
             await this.updateValue();
         }