Improve trail planning: option to re-order route anchors (#1007)

* trail anchor list added

* add search location card to extend route endpoint in drawing mode

* add POI popup endpoint action in route drawing mode

* fix anchor stats, improve anchor list entries and refine route marker behavior

* fix map marker spinner

* docs updated

* fix spinner when delete an anchor

* further improvements

* fix adding first anchor from POI

* optimize drag handle area

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Co-authored-by: Flomp <Flomp@users.noreply.github.com>

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

@@ -373,6 +373,7 @@
   "road": "道路",
   "route": "{n, plural, =1 {Route} other {Routes}}",
   "route-point": "路线点",
+  "add-as-endpoint": "Add as endpoint",
   "russian": "Russian",
   "save": "保存",
   "save-list": "保存列表",