[FIX] web_editor: allow translations of hidden blocks

Steps to reproduce:
- Drop a block, hide it on desktop and save
- Add a second language and click on translate
=> This raises an error.

The bug happened after the forward-port of [1] to 16.3, because
`_updateInvisibleDOM` was called prior to `_loadSnippetsTemplates`: it
then tried to `_createSnippetEditor`, requiring `templateOptions` while
they were still undefined.

opw-3383659

[1]: https://github.com/odoo/odoo/commit/959ea3d361f

closes odoo/odoo#127139

X-original-commit: c92ea9f10cdd38b275157e1ba7e79b84e3e45cbb
Signed-off-by: Romain Derie (rde) <rde@odoo.com>

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

@@ -1925,8 +1925,8 @@ var SnippetsMenu = Widget.extend({
 
         if (this.options.enableTranslation) {
             // Load the sidebar with the style tab only.
-            defs.push(this._updateInvisibleDOM());
             await this._loadSnippetsTemplates();
+            defs.push(this._updateInvisibleDOM());
             this.$el.find('.o_we_website_top_actions').removeClass('d-none');
             this.$('.o_snippet_search_filter').addClass('d-none');
             this.$('#o_scroll').addClass('d-none');