Fix update of properties on setTarget in StyleManager. Closes #3081

src/style_manager/view/PropertyView.js

@@ -345,7 +345,7 @@ export default Backbone.View.extend({
   getTargetValue(opts = {}) {
     let result;
     const { model } = this;
-    const target = this.getTargetModel();
+    const target = this.getTargets()[0];
     const customFetchValue = this.customValue;
 
     if (!target) {