[FIX] website: fix unable to enter edit mode on old browsers

Since commit [1], we added a selector using the ":has" pseudo-class in
the template that defines where "inner content" blocks can be dropped.
It is no longer possible to enter edit mode (a traceback occurs)
starting from Odoo version 18.0 and in browsers older than Chrome 112 or
Firefox 121.

This bug happens because the same selector, used by jQuery, combines
both the ":has" pseudo-class and the ":is" pseudo-class (this ":is"
pseudo-class was introduced into the same selector by commit [2]
starting from Odoo version 18.0). This is not compatible with the older
browsers mentioned above.

The bug only appears in version 18. However, we already fixed this in
16.0 in case potential customizations had added the ":is" pseudo-class
to the same selector.

[1]: odoo@65a8500
[2]: odoo@e0fc837

opw-4494945

closes odoo#195095

X-original-commit: 9360142
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>
Signed-off-by: Benjamin Vray (bvr) <bvr@odoo.com>

Author: bvr-odoo

addons/website/static/src/js/editor/snippets.editor.js

@@ -242,8 +242,8 @@ export class WebsiteSnippetsMenu extends weSnippetEditor.SnippetsMenu {
         // TODO remove in master and adapt XML.
         const contentAdditionEl = html.querySelector("#so_content_addition");
         if (contentAdditionEl) {
-            // Allows dropping "inner blocks" next to an image link.
-            contentAdditionEl.dataset.dropNear += ", div:not(.o_grid_item_image) > a:has(img)";
+            // Necessary to be able to drop "inner blocks" next to an image link.
+            contentAdditionEl.dataset.dropNear += ", div:not(.o_grid_item_image) > a";
         }
 
         const toFind = $html.find("we-fontfamilypicker[data-variable]").toArray();