Toolbar isn't reset when editor is out of focus

[jacobmllr95]

When the content of the editor gets reset the toolbar styles should be reset too. This works as long as the editor has focus. When the editor is out of focus the toolbar isn't reset.

See also: #446, #457

Steps for Reproduction

1. Visit http://beta.quilljs.com/
2. Highlight the first word in the editor (Quill)
3. Format it bold
4. Click somewhere outside the editor
5. Open the browser console
6. Execute quill.setText('');

Expected behavior: All toolbar styles should be reset

Actual behavior: The toolbar styles aren't reset (bold format is still active)

Platforms: Chrome 51 on Mac 10.11

Version: 1.0.0-beta.9