Add highway=corridor and universal level field

For now, `highway=corridor`:
  * styled like highway=pedestrian
  * and matches 'paths' feature filter.

(closes #2687, closes #2218)

data/presets.yaml

@@ -507,6 +507,9 @@ en:
       length:
         # 'length=*'
         label: Length (Meters)
+      level:
+        # 'level=*'
+        label: Level
       levels:
         # 'building:levels=*'
         label: Levels
@@ -1993,6 +1996,11 @@ en:
         # highway=bus_stop
         name: Bus Stop
         terms: "<translate with synonyms or related terms for 'Bus Stop', separated by commas>"
+      highway/corridor:
+        # highway=corridor
+        name: Indoor Corridor
+        # 'terms: indoor'
+        terms: "<translate with synonyms or related terms for 'Indoor Corridor', separated by commas>"
       highway/crossing:
         # highway=crossing
         name: Crossing

data/presets/fields.json

@@ -677,6 +677,12 @@
         "type": "number",
         "label": "Length (Meters)"
     },
+    "level": {
+        "key": "level",
+        "type": "combo",
+        "label": "Level",
+        "universal": true
+    },
     "levels": {
         "key": "building:levels",
         "type": "number",

data/presets/fields/level.json

@@ -0,0 +1,6 @@
+{
+    "key": "level",
+    "type": "combo",
+    "label": "Level",
+    "universal": true
+}

data/presets/presets.json

@@ -3853,6 +3853,24 @@
         "terms": [],
         "name": "Bus Stop"
     },
+    "highway/corridor": {
+        "icon": "highway-footway",
+        "fields": [
+            "width",
+            "level",
+            "access_simple"
+        ],
+        "geometry": [
+            "line"
+        ],
+        "tags": {
+            "highway": "corridor"
+        },
+        "terms": [
+            "indoor"
+        ],
+        "name": "Indoor Corridor"
+    },
     "highway/crossing": {
         "fields": [
             "crossing",
@@ -4056,6 +4074,7 @@
         "name": "Path"
     },
     "highway/pedestrian": {
+        "icon": "highway-footway",
         "fields": [
             "surface",
             "lit",

data/presets/presets/highway/corridor.json

@@ -0,0 +1,18 @@
+{
+    "icon": "highway-footway",
+    "fields": [
+        "width",
+        "level",
+        "access_simple"
+    ],
+    "geometry": [
+        "line"
+    ],
+    "tags": {
+        "highway": "corridor"
+    },
+    "terms": [
+        "indoor"
+    ],
+    "name": "Indoor Corridor"
+}

data/presets/presets/highway/pedestrian.json

@@ -1,4 +1,5 @@
 {
+    "icon": "highway-footway",
     "fields": [
         "surface",
         "lit",
@@ -8,7 +9,8 @@
         "access"
     ],
     "geometry": [
-        "line", "area"
+        "line",
+        "area"
     ],
     "tags": {
         "highway": "pedestrian"

data/taginfo.json

@@ -879,6 +879,10 @@
             "key": "highway",
             "value": "bus_stop"
         },
+        {
+            "key": "highway",
+            "value": "corridor"
+        },
         {
             "key": "highway",
             "value": "crossing"