[FIX] web_editor: close open invisible elements before deleting it

Before this commit, open invisible elements were not closed before
being deleted. This created issues like the 'modal-open' class wich
was not removed from the body when removing a modal.

Part of https://github.com/odoo/odoo/pull/61998
task-2312878

X-original-commit: a67f7df31a9e5a5550d54d52ae506299f4a62581

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

@@ -297,6 +297,8 @@ var SnippetEditor = Widget.extend({
     removeSnippet: async function () {
         this.toggleOverlay(false);
         this.toggleOptions(false);
+        // If it is an invisible element, we must close it before deleting it (e.g. modal)
+        await this.toggleTargetVisibility(!this.$target.hasClass('o_snippet_invisible'));
 
         await new Promise(resolve => {
             this.trigger_up('call_for_each_child_snippet', {