[FIX] web_editor: fix overlay missing after animation

Before this commit, with some animations (e.g. Bounce In-Left) the
overlay of the animated element or the overlay of selected element
inside it no longer reappeared after the animation.

task-2630112

closes odoo/odoo#75444

X-original-commit: fb98430b1cdbc63896d152b39bcf23c0f2241cb4
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

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

@@ -226,7 +226,11 @@ var SnippetEditor = Widget.extend({
         }
 
         var _animationsCount = 0;
-        var postAnimationCover = _.throttle(() => this.cover(), 100);
+        var postAnimationCover = _.throttle(() => {
+            this.trigger_up('cover_update', {
+                overlayVisible: true,
+            });
+        }, 100);
         this.$target.on('transitionstart.snippet_editor, animationstart.snippet_editor', () => {
             // We cannot rely on the fact each transition/animation start will
             // trigger a transition/animation end as the element may be removed
@@ -2590,9 +2594,13 @@ var SnippetsMenu = Widget.extend({
      * Called when the overlay dimensions/positions should be recomputed.
      *
      * @private
+     * @param {OdooEvent} ev
      */
-    _onOverlaysCoverUpdate: function () {
+    _onOverlaysCoverUpdate: function (ev) {
         this.snippetEditors.forEach(editor => {
+            if (ev.data.overlayVisible) {
+                editor.toggleOverlayVisibility(true);
+            }
             editor.cover();
         });
     },