Codeeditor: fixed resize handling

vispa/extensions/codeeditor/static/js/view.js

@@ -122,7 +122,9 @@ define([
     },
 
     onResize: function() {
-      this.editor.resize();
+      if (this.editor) {
+        this.editor.resize();
+      }
     },
 
     onFocus: function() {
@@ -135,8 +137,6 @@ define([
       if (this.editor && this.editor.ace) {
         this.editor.ace.blur();
       }
-
-      return this;
     },
 
     onBeforeClose: function() {