@bender-ui: collapsed
@bender-tags: bug, 4.7.2, 646
@bender-ckeditor-plugins: wysiwygarea, toolbar, stylescombo

1. Open browser console.
1. Press empty button in toolbar. It's located on the right next to the styles' list.
1. Open styles' list and check if there anyting appear in the console.

**Expected:** There is no error in the console.

**Unexpected:** Error is logged in console.
