WIP(customizations): revised backgrounds modal

website/common/locales/en/backgrounds.json

@@ -245,7 +245,7 @@
   "backgroundWindyAutumnText": "Windy Autumn",
   "backgroundWindyAutumnNotes": "Chase leaves during a Windy Autumn.",
 
-  "incentiveBackgrounds": "Plain Background Set",
+  "incentiveBackgrounds": "Standard Backgrounds",
   "backgroundVioletText": "Violet",
   "backgroundVioletNotes": "A vibrant violet backdrop.",
   "backgroundBlueText": "Blue",
@@ -981,5 +981,7 @@
 
   "eventBackgrounds": "Event Backgrounds",
   "backgroundBirthdayBashText": "Birthday Bash",
-  "backgroundBirthdayBashNotes": "Habitica's having a birthday party, and everyone's invited!"
+  "backgroundBirthdayBashNotes": "Habitica's having a birthday party, and everyone's invited!",
+
+  "monthlyBackgrounds": "Monthly Backgrounds"
 }

website/common/script/ops/unlock.js

@@ -224,7 +224,7 @@ export default async function unlock (user, req = {}, analytics) {
   // The passed paths are not used anymore after this point for full sets
   const { set, items, paths } = getSet(setType, firstPath, req);
 
-  if (isBackground) {
+  if (isBackground && !alreadyUnlocked(user, setType, path)) {
     const matchers = getScheduleMatchingGroup('backgrounds');
     if (!matchers.match(set.key)) {
       throw new NotAuthorized(i18n.t('notAvailable', req.language));