Theme format refactoring: move line properties into a seperate lineRendering configuration

assets/layers/surveillance_camera/surveillance_camera.json

@@ -531,6 +531,14 @@
                     }
                 ]
             }
+        },
+        {
+            "color": {
+                "render": "#f00"
+            },
+            "width": {
+                "render": "8"
+            }
         }
     ]
 }