[FIX] web_editor: selecting link makes editor dirty

Current behaviour before commit:

In a saved pad, putting cursor inside a link without
making any other changes makes editor dirty. As result
discard button appears on the top.

Desired behaviour after commit:

Now putting cursor inside a link without editing
doesn't make editor dirty and discard button doesn't
appear on top.

task-3607361

closes odoo/odoo#151094

X-original-commit: d7f89ca078ec21fe0db49ae5b01f21caecd6abfa
Signed-off-by: Antoine Guenet (age) <age@odoo.com>

addons/web_editor/static/src/js/editor/odoo-editor/src/utils/sanitize.js

@@ -245,7 +245,7 @@ export function sanitize(nodeToSanitize, root = nodeToSanitize) {
         let node = isList ? block.parentElement : block;
 
         // Sanitize the tree.
-        while (node?.isConnected && root.contains(node)) {
+        while (node && !(root.isConnected && !node.isConnected) && root.contains(node)) {
             if (!isProtected(node)) {
                 node = sanitizeNode(node, root); // The node itself might be replaced during sanitization.
             }