Add building_area field to bandstand preset

(re: https://github.com/openstreetmap/iD/pull/5262#issuecomment-418441439)

data/presets.yaml

@@ -3814,6 +3814,10 @@ en:
         name: Amusement Arcade
         # 'terms: pay-to-play games,video games,driving simulators,pinball machines'
         terms: '<translate with synonyms or related terms for ''Amusement Arcade'', separated by commas>'
+      leisure/bandstand:
+        # leisure=bandstand
+        name: Bandstand
+        terms: '<translate with synonyms or related terms for ''Bandstand'', separated by commas>'
       leisure/beach_resort:
         # leisure=beach_resort
         name: Beach Resort

data/presets/presets.json

@@ -464,6 +464,7 @@
     "leisure": {"icon": "maki-pitch", "fields": ["name", "leisure"], "geometry": ["point", "vertex", "area"], "tags": {"leisure": "*"}, "name": "Leisure"},
     "leisure/adult_gaming_centre": {"icon": "temaki-dice", "fields": ["name", "operator", "address", "building_area", "opening_hours", "smoking"], "geometry": ["point", "area"], "terms": ["gambling", "slot machine"], "tags": {"leisure": "adult_gaming_centre"}, "name": "Adult Gaming Center"},
     "leisure/amusement_arcade": {"icon": "maki-gaming", "fields": ["name", "operator", "address", "building_area", "opening_hours"], "geometry": ["point", "area"], "terms": ["pay-to-play games", "video games", "driving simulators", "pinball machines"], "tags": {"leisure": "amusement_arcade"}, "name": "Amusement Arcade"},
+    "leisure/bandstand": {"icon": "maki-music", "fields": ["name", "building_area", "operator"], "geometry": ["point", "area"], "tags": {"leisure": "bandstand"}, "name": "Bandstand"},
     "leisure/beach_resort": {"icon": "temaki-beach", "fields": ["name", "address", "fee"], "geometry": ["point", "area"], "tags": {"leisure": "beach_resort"}, "name": "Beach Resort"},
     "leisure/bird_hide": {"icon": "temaki-binoculars", "fields": ["building_area"], "geometry": ["point", "area"], "tags": {"leisure": "bird_hide"}, "terms": ["machan", "ornithology"], "name": "Bird Hide"},
     "leisure/bleachers": {"geometry": ["point", "area"], "tags": {"leisure": "bleachers"}, "terms": ["crowd", "bench", "sports", "stand", "stands", "seat", "seating"], "name": "Bleachers"},

data/presets/presets/leisure/bandstand.json

@@ -2,6 +2,7 @@
     "icon": "maki-music",
     "fields": [
         "name",
+        "building_area",
         "operator"
     ],
     "geometry": [
@@ -9,8 +10,7 @@
         "area"
     ],
     "tags": {
-        "leisure": "bandstand",
-        "building": "roof"
+        "leisure": "bandstand"
     },
     "name": "Bandstand"
 }

data/taginfo.json

@@ -3114,6 +3114,13 @@
       "object_types": ["node", "area"],
       "icon_url": "https://raw.githubusercontent.com/mapbox/maki/master/icons/gaming-15.svg?sanitize=true"
     },
+    {
+      "key": "leisure",
+      "value": "bandstand",
+      "description": "Bandstand",
+      "object_types": ["node", "area"],
+      "icon_url": "https://raw.githubusercontent.com/mapbox/maki/master/icons/music-15.svg?sanitize=true"
+    },
     {
       "key": "leisure",
       "value": "beach_resort",

dist/locales/en.json

@@ -4785,6 +4785,10 @@
                     "name": "Amusement Arcade",
                     "terms": "pay-to-play games,video games,driving simulators,pinball machines"
                 },
+                "leisure/bandstand": {
+                    "name": "Bandstand",
+                    "terms": ""
+                },
                 "leisure/beach_resort": {
                     "name": "Beach Resort",
                     "terms": ""