Refactoring: further cleanup of the themes

assets/layers/map/map.json

@@ -264,21 +264,15 @@
           }
         ]
       },
-      "iconSize": {
-        "render": "50,50,center"
-      },
+      "iconSize": "50,50,center",
       "location": [
         "point",
         "centroid"
       ]
     },
     {
-      "color": {
-        "render": "#00f"
-      },
-      "width": {
-        "render": "8"
-      }
+      "color": "#00f",
+      "width": "8"
     }
   ]
 }