Fix negative number of trips in ImproveOSM issues

See https://github.com/openstreetmap/iD/pull/5739#issuecomment-460786055

data/core.yaml

@@ -684,6 +684,7 @@ en:
         mr:
           title: Missing Geometry
           description: '{num_trips} recorded trips in this area suggest there may be unmapped {geometry_type} here.'
+          description_alt: 'Data from a 3rd party suggests there may be unmapped {geometry_type} here.'
         tr:
           title: Missing Turn Restriction
           description: '{num_passed} of {num_trips} recorded trips (travelling {travel_direction}) make a turn from {from_way} to {to_way} at {junction}. There may be a missing "{turn_restriction}" restriction.'
@@ -1547,4 +1548,4 @@ en:
   wikidata:
     identifier: "Identifier"
     label: "Label"
-    description: "Description"
+    description: "Description"

dist/locales/en.json

@@ -828,7 +828,8 @@
                     },
                     "mr": {
                         "title": "Missing Geometry",
-                        "description": "{num_trips} recorded trips in this area suggest there may be unmapped {geometry_type} here."
+                        "description": "{num_trips} recorded trips in this area suggest there may be unmapped {geometry_type} here.",
+                        "description_alt": "Data from a 3rd party suggests there may be unmapped {geometry_type} here."
                     },
                     "tr": {
                         "title": "Missing Turn Restriction",

modules/services/improveOSM.js

@@ -267,6 +267,11 @@ export default {
                                     geometry_type: t('QA.improveOSM.geometry_types.' + geoType)
                                 };
 
+                                // -1 trips indicates data came from a 3rd party
+                                if (feature.numberOfTrips === -1) {
+                                    d.desc = t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+                                }
+
                                 _erCache.data[d.id] = d;
                                 _erCache.rtree.insert(encodeErrorRtree(d));
                             });
@@ -476,4 +481,4 @@ export default {
     getClosedIDs: function() {
         return Object.keys(_erCache.closed).sort();
     }
-};
+};

modules/ui/improveOSM_details.js

@@ -17,6 +17,9 @@ export function uiImproveOsmDetails(context) {
         var unknown = t('inspector.unknown');
 
         if (!d) return unknown;
+
+        if (d.desc) return d.desc;
+
         var errorType = d.error_key;
         var et = dataEn.QA.improveOSM.error_types[errorType];
 
@@ -124,4 +127,4 @@ export function uiImproveOsmDetails(context) {
 
 
     return improveOsmDetails;
-}
+}