add preset for man_made=video_wall

Author: k-yle

data/fields/min_height.json

@@ -0,0 +1,9 @@
+{
+  "key": "min_height",
+  "minValue": 0,
+  "type": "number",
+  "label": "Height of bottom (Meters)",
+  "prerequisiteTag": {
+    "key": "height"
+  }
+}

data/presets/man_made/video_wall.json

@@ -0,0 +1,11 @@
+{
+  "icon": "temaki-billboard",
+  "fields": ["support", "operator", "height", "min_height"],
+  "moreFields": ["name", "ref", "website", "visibility"],
+  "geometry": ["point", "vertex", "line"],
+  "terms": ["screen", "tv", "television", "display", "video wall", "led wall"],
+  "tags": {
+    "man_made": "video_wall"
+  },
+  "name": "Digital Screen"
+}