Fix type in addClass

src/selector_manager/index.js

@@ -203,14 +203,7 @@ module.exports = config => {
         classes = classes.trim().split(' ');
       }
 
-      classes.forEach(name =>
-        added.push(
-          selectors.add({
-            name,
-            type: Selector.TYPE_ID
-          })
-        )
-      );
+      classes.forEach(name => added.push(selectors.add({ name })));
       return added;
     },
 

src/selector_manager/model/Selectors.js

@@ -4,7 +4,7 @@ const Selector = require('./Selector');
 module.exports = require('backbone').Collection.extend({
   model: Selector,
 
-  modelId: attr => `${attr.name}_${attr.type}`,
+  modelId: attr => `${attr.name}_${attr.type || Selector.TYPE_CLASS}`,
 
   getStyleable() {
     return filter(