amenity=bench: Add armrest field, move color to moreFields (#1227)

Author: bompstable

data/fields/armrest.json

@@ -0,0 +1,12 @@
+{
+    "key": "armrest",
+    "type": "check",
+    "label": "Armrests",
+    "strings": {
+        "options": {
+            "undefined": "Unknown",
+            "yes": "One or more armrests",
+            "no": "No armrests"
+        }
+    }
+}

data/presets/amenity/bench.json

@@ -2,11 +2,12 @@
     "icon": "temaki-bench",
     "fields": [
         "backrest",
+        "armrest",
         "material",
-        "seats",
-        "colour"
+        "seats"
     ],
     "moreFields": [
+        "colour",
         "access_simple",
         "direction",
         "height",