TinyMCE inserts spans with font-styles atributes

[thomask]

This is continuation of #14218 which seems to be not fixed in 3.1 and still exist even in current 3.2. Reproducing steps

1. Open WP in latest Chrome (any version) - and probably also in other webkit browsers
2. Create new post
3. create UL with clicking on bullet icon
4. type some Li elements
5. close ul with <- icon (in advanced tinymce line)
6. type some text
7. switch to html view or publish article and see the code, you will see something like

asdfasdfh
<ul>
	<li>asfasdfa</li>
	<li>asdfa</li>
	<li>asfd</li>
</ul>
<span style="font-size: small;"><span class="Apple-style-span" style="line-height: 24px;">adfasdfasd</span></span>

<span style="font-size: small;"><span class="Apple-style-span" style="line-height: 24px;">asfasd</span></span>

<span style="font-size: small;"><span class="Apple-style-span" style="line-height: 24px;">
</span></span>

P.S.: i can't select Version 3.2 in the bug report properties

[duck_]

#17154

Whoops :)