Add ref and railway:track_ref fields to railway=rail and =switch presets (#1083)

data/fields/railway/track_ref.json

@@ -0,0 +1,5 @@
+{
+    "key": "railway:track_ref",
+    "type": "text",
+    "label": "Track Number"
+}

data/fields/ref_rail.json

@@ -0,0 +1,5 @@
+{
+    "key": "ref",
+    "type": "text",
+    "label": "Line Number"
+}

data/presets/railway/rail.json

@@ -1,11 +1,13 @@
 {
     "icon": "temaki-railway_track",
     "fields": [
-        "{railway/light_rail}"
+        "{railway/light_rail}",
+        "railway/track_ref"
     ],
     "moreFields": [
         "{railway/light_rail}",
-        "highspeed"
+        "highspeed",
+        "ref_rail"
     ],
     "geometry": [
         "line"

data/presets/railway/switch.json

@@ -1,5 +1,8 @@
 {
     "icon": "temaki-junction",
+    "fields": [
+        "ref"
+    ],
     "geometry": [
         "vertex"
     ],