adds grid lines to print map

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

@@ -83,6 +83,11 @@
   "metric": "公制",
   "moderate": "中等",
   "must-be-at-least-n-characters-long": "长度至少 {n} 字符",
+  "n-days-ago": "",
+  "n-hours-ago": "",
+  "n-minutes-ago": "",
+  "n-months-ago": "",
+  "n-seconds-ago": "",
   "n-years-ago": "",
   "name": "名称",
   "near": "附近",
@@ -99,6 +104,7 @@
   "pick-a-trail": "选择一个路线",
   "polish": "波兰语",
   "portuguese": "葡萄牙语",
+  "print": "",
   "profile": "个人资料",
   "public": "公开",
   "radius": "半径",