[IE] Edit image link result incorrect inside floated div

[Garry Yao]

1. Open the 'replace by class' sample page in IE, load the editor with following content:

   	<div style="float:right">
   		<a href="http://a.com"><img alt="" src="http://dev.fckeditor.net/chrome/site/logos.gif"/></a>
   	</div>
   

2. Select the image by clicking on it or from the elements path bar.
3. Right click to open context menu and select 'Unlink';

• Actual Result: The link is not removed from the image.

[Garry Yao]

Actually all floated elements are treated as control type in design mode with IE.

[Garry Yao]

The bug is proven by TC ( TC passed in all browsers ) that not related to #3677, correct the description.

[Garry Yao]

Confirmed to be yet another DUP of #4041.

[Garry Yao]

It ​turns out that #4041 will not handle this bug, reopen it.
Manual TCs added at : ​http://ckeditor.t/tt/3678/1.html

[Frederico Caldeira Knabben]

#4749 may be related to this.

[Garry Yao]

Supposed to be fixed by #4647.

[Garry Yao]

Fixed by #4647.

[Frederico Caldeira Knabben]

We still need a changelog entry for this one, even if it has been fixed in another ticket.

[Frederico Caldeira Knabben]

Changelog added with [5025].