feat(utm): propagate join focus mode

config.json

@@ -57,6 +57,13 @@
         "2": 1
       },
       "default": "1"
+    },
+    "focus": {
+      "weights": {
+        "center": 1,
+        "face": 0
+      },
+      "default": "center"
     }
   }
 }