[12.0][FIX]web_timeline: fix group orders

web_timeline/__manifest__.py

@@ -4,7 +4,7 @@
 {
     'name': "Web timeline",
     'summary': "Interactive visualization chart to show events in time",
-    "version": "12.0.1.0.3",
+    "version": "12.0.1.0.4",
     "development_status": "Production/Stable",
     'author': 'ACSONE SA/NV, '
               'Tecnativa, '

web_timeline/static/src/js/timeline_view.js

@@ -166,7 +166,8 @@ odoo.define('web_timeline.TimelineView', function (require) {
             if (grp2.id === -1) {
                 return +1;
             }
-            return grp1.content - grp2.content;
+
+            return grp1.content.locateCompare(grp2.content);
 
         },