Fix more themes

assets/layers/named_streets/named_streets.json

@@ -11,7 +11,7 @@
   },
   "minzoom": 18,
   "shownByDefault": false,
-  "pointRendering": [],
+  "pointRendering": null,
   "lineRendering": [
     {
       "color": "#ccc",

assets/layers/stairs/license_info.json

@@ -6,5 +6,15 @@
       "Robin van der Linde"
     ],
     "sources": []
+  },
+  {
+    "path": "stairs.svg",
+    "license": "CC-BY SA 4.0",
+    "authors": [
+      " \tFont Awesome"
+    ],
+    "sources": [
+      "https://commons.wikimedia.org/wiki/File:Stairs-solid.svg"
+    ]
   }
 ]

assets/layers/stairs/stairs.json

@@ -39,7 +39,22 @@
       }
     ]
   },
-  "pointRendering": [],
+  "pointRendering": [
+    {
+      "marker": [
+        {
+          "icon": "circle",
+          "color": "white"
+        },
+        {
+          "icon": "./assets/layers/stairs/stairs.svg"
+        }
+      ],
+      "location": [
+        "point"
+      ]
+    }
+  ],
   "lineRendering": [
     {
       "color": "gray",

assets/layers/stairs/stairs.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><!--! Font Awesome Pro 6.2.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2022 Fonticons, Inc. --><path d="M384 64c0-17.7 14.3-32 32-32H544c17.7 0 32 14.3 32 32s-14.3 32-32 32H448v96c0 17.7-14.3 32-32 32H320v96c0 17.7-14.3 32-32 32H192v96c0 17.7-14.3 32-32 32H32c-17.7 0-32-14.3-32-32s14.3-32 32-32h96V320c0-17.7 14.3-32 32-32h96V192c0-17.7 14.3-32 32-32h96V64z"/></svg>

assets/layers/stairs/stairs.svg.license

@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText:  	Font Awesome
+SPDX-License-Identifier: CC-BY SA 4.0

assets/layers/transit_routes/transit_routes.json

@@ -63,7 +63,7 @@
     },
     "icons.defaults"
   ],
-  "pointRendering": [],
+  "pointRendering": null,
   "lineRendering": [
     {
       "color": {

assets/layers/walls_and_buildings/walls_and_buildings.json

@@ -43,7 +43,7 @@
       "cs": "Zeď nebo budova"
     }
   },
-  "pointRendering": [],
+  "pointRendering": null,
   "lineRendering": [
     {
       "color": "#fff",