[FIX] web_editor: check if closestElement returns element

`getInSelection` had a check that depended on `closestElement` returning
an element (and not `undefined` or `null`).

closes odoo/odoo#107061

X-original-commit: 0eeff8266ab1c3bdd15d4587aaf83e299811c3fa
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>

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

@@ -1391,13 +1391,17 @@ export function containsUnremovable(node) {
 export function getInSelection(document, selector) {
     const selection = document.getSelection();
     const range = selection && !!selection.rangeCount && selection.getRangeAt(0);
-    return (
-        range &&
-        (closestElement(range.startContainer, selector) ||
-            [...closestElement(range.commonAncestorContainer).querySelectorAll(selector)].find(
+    if (range) {
+        const selectorInStartAncestors = closestElement(range.startContainer, selector);
+        if (selectorInStartAncestors) {
+            return selectorInStartAncestors;
+        } else {
+            const commonElementAncestor = closestElement(range.commonAncestorContainer);
+            return commonElementAncestor && [...commonElementAncestor.querySelectorAll(selector)].find(
                 node => range.intersectsNode(node),
-            ))
-    );
+            );
+        }
+    }
 }
 
 /**