Seasonal gear fix (#15255)

* cleanup unneeded season definitions

* assign first winter seasonal gear right season

* add missing winter definition

* Fix enddate for winter galas

* fix lint

* fix halloween sprites

* set season

* fix loading habitoween sprites

* add missing customization shop sprites

* Fix test

* update customization shop sprites

website/server/controllers/api-v3/world.js

@@ -35,7 +35,7 @@ api.getWorldState = {
     }
 
     worldState.currentEventList.forEach(event => {
-      if (event.npcImageSuffix) {
+      if (event.npcImageSuffix && !worldState.npcImageSuffix) {
         worldState.npcImageSuffix = event.npcImageSuffix;
       }
     });