Add unlimited local avatar favs (#845)

* Add unlimited local avatar favs

Implement unlimited local avatar favs with VRC+ requirement.

* Reflect avatar fav changes in translations

Modify translation files to use the same string used for world favs since it's the same now.

* Local avatar fav UI behaviour changes

* Add select avatar button to avatar favs

* Disable select avatar button if already wearing it

html/src/localization/ru/en.json

@@ -770,7 +770,7 @@
             },
             "actions": {
                 "delete_cache_tooltip": "Удалить аватар из кэша",
-                "favorite_tooltip": "Добавить в избранное",
+                "favorite_tooltip": "Избранное",
                 "unfavorite_tooltip": "Убрать из Избранного",
                 "refresh": "Обновить",
                 "select": "Выбрать аватар",