Set popup behavior weight to -100.

...so that behaviors that use instance.popup.on()
(including asset_type_layers) don't need to worry
about setting their weight heavier.

modules/core/map/js/farmOS.map.behaviors.popup.js

@@ -47,6 +47,9 @@
         return content;
       });
     },
-    weight: 100,
+
+    // Make sure this runs early so other behaviors can dispatch popup events
+    // with instance.popup.on().
+    weight: -100,
   };
 }());

modules/ui/map/js/farmOS.map.behaviors.asset_type_layers.js

@@ -104,9 +104,6 @@
             });
         }
       });
-    },
-
-    // Make sure this runs after farmOS.map.behaviors.popup.
-    weight: 101,
+    }
   };
 }());