[FIW] website_event_track: fix location order

Without this commit, each refresh of the agenda, will randomly show the locs.

-- Fix done in prod for oxp

closes odoo/odoo#29300

addons/website_event_track/controllers/main.py

@@ -64,6 +64,7 @@ class WebsiteEventTrackController(http.Controller):
                 locations[location][-1][3] -= 1
             locations[location].append([track, start_date, end_date, 1])
             dates[-1][1][location] = locations[location][-1]
+            locations = collections.OrderedDict(sorted(locations.items(), key=lambda t: t[0].id if t[0] else 0))
         return {
             'locations': locations,
             'dates': dates