[FIX] website: fix anchor selector not closing

Steps to reproduce the bug:

- Drop the image-text snippet on the homepage.
- Double click on the button inside the snippet.
- Choose the homepage as the URL ("/").
- Open the "Page Anchor" selector and click on "#top".
- Bug: the select does not close itself after selection.

This bug occurred because there are two instances of Bootstrap on the
same element (the link anchor dropdown): the "bs.dropdown" instance and
the "bs.tooltip" instance. The tooltip instance was added by this commit
[1], probably unintentionally during a copy-paste operation.
Additionally, the text of the Tooltip was not correct ("Link size").

Having these two instances on the same element caused an error because,
since this commit [2], we check that an element doesn't have only one
instance. If multiple instances are found, the others are disabled. This
check was the reason why the "bs.dropdown" instance stopped working.

Note that we could have kept the Tooltip by moving it to the
"we-toggler" element. However, we removed it because it didn't provide
any additional value, the text of the label itself is sufficient.

[1]: https://github.com/odoo/odoo/commit/740168ce8d27da3d6a7156d2d79655a898394923
[2]: https://github.com/odoo/odoo/commit/c48f57ea2538ad51e00ac27d58f8e191781444f3

task-3378864

closes odoo/odoo#126715

X-original-commit: 6367129caf2c5d4e59ba7db0fe47047be0cb6caf
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

addons/website/static/src/xml/website.editor.xml

@@ -21,8 +21,7 @@
                     <div>
                         <div class="dropdown">
                             <button class="dropdown-toggle"
-                                data-bs-toggle="dropdown" title="" tabindex="-1"
-                                data-bs-original-title="Link Size" aria-expanded="false">
+                                data-bs-toggle="dropdown" tabindex="-1" aria-expanded="false">
                                 <we-toggler>
                                     Loading...
                                 </we-toggler>