Extract missing strings

locales/en.json

@@ -28,6 +28,8 @@
         "format_geojson": "GeoJSON",
         "format_gpx": "GPX",
         "format_kml": "KML",
+        "include": "Include",
+        "include_waypoints": "Waypoints",
         "route-from-to": "{{from}} -> {{to}} ({{distance}}km)",
         "route-loop": "{{from}} ({{distance}}km)",
         "title": "Export route",
@@ -55,6 +57,7 @@
         "add-base": "Add base layer",
         "add-overlay": "Add overlay",
         "customize": "Customize layers",
+        "opacity-slider": "Opacity slider",
         "placeholder-layer-name": "Custom layer name. (ex: OpenStreetMap)",
         "placeholder-layer-url": "Custom layer URL. (ex: https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png)",
         "remove-selection": "Remove selection"
@@ -181,6 +184,7 @@
             "expand": "Expand all",
             "optional": "Add or remove optional layers",
             "optional-layers": "More",
+            "overlay-opacity": "Overlay transparency",
             "table": {
                 "URL": "URL",
                 "empty": "No custom layer configured yet.",