adds layer manager

web/src/lib/i18n/locales/zh.json

@@ -190,6 +190,7 @@
   "joined": "Joined",
   "language": "语言",
   "latitude": "维度",
+  "layer": "",
   "license": "开源协议",
   "like-status": "Like Status",
   "liked": "Liked",
@@ -210,6 +211,7 @@
   "make-one": "立刻注册！",
   "make-thumbnail": "生成缩略图",
   "map": "地图",
+  "map-style": "",
   "max-hiking-difficulty": "Max. Hiking Difficulty",
   "metric": "公制",
   "moderate": "中等",
@@ -278,6 +280,7 @@
   "pick-a-trail": "选择一个路线",
   "planned-a-trail": "planned a trail",
   "planned-tours": "Planned tours",
+  "pois": "",
   "polish": "波兰语",
   "portuguese": "葡萄牙语",
   "print": "打印",