[FIX] web_editor: avoid contenteditable reset when doing link isolation

Reproduction:

1. install website, drag a block with button
2. click at the beginning of the button text
3. type something, it will be outside of the button area

Reason:
The contenteditable is reset depending on the o_editable and
o_not_editable class in the _onPostSanitize function.

Fix: don’t do the resetting when we have the _fixLinkMutatedElements key
in OdooEditor as it indicates that the link isolation trick is executing

task-3514628

closes odoo/odoo#139030

X-original-commit: 1727317f258d184432b01b6295d01f688e298257
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>
Co-authored-by: Nicolas Bayet <nby@odoo.com>

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

@@ -1923,14 +1923,14 @@ export class OdooEditor extends EventTarget {
 
     setContenteditableLink(link) {
         const editableChildren = link.querySelectorAll('[contenteditable=true]');
-        this._stopContenteditable();
-
         this._fixLinkMutatedElements = {
             link,
             wasContenteditableTrue: [...editableChildren],
             wasContenteditableFalse: [],
             wasContenteditableNull: [],
         };
+        this._stopContenteditable();
+
         const contentEditableAttribute = link.getAttribute('contenteditable');
         if (contentEditableAttribute === 'true') {
             this._fixLinkMutatedElements.wasContenteditableTrue.push(link);

addons/web_editor/static/src/js/wysiwyg/wysiwyg.js

@@ -3201,7 +3201,8 @@ export class Wysiwyg extends Component {
      * @param {Node} node
      */
     _onPostSanitize(node) {
-        if (node?.querySelectorAll) {
+        // _fixLinkMutatedElements check to be removed after the new link edge soltion is merged.
+        if (node?.querySelectorAll && this.odooEditor && !this.odooEditor._fixLinkMutatedElements) {
             for (const element of node.querySelectorAll('.o_editable, .o_not_editable')) {
                 const editable = element.classList.contains('o_editable');
                 if (element.isContentEditable !== editable) {