IE8 - Link not preserved on double-click in inline editor.

[Jakub Ś]

1. Open IE8 browser and massive inline creation sample.
2. Click image icon in the toolbar.
3. Enter some image url in the URL text box (e.g. ​http://upload.wikimedia.org/wikipedia/commons/9/95/Ferrari_P4-5.jpg).
4. Click Link tab
5. Enter some url like ​http://www.google.com and click "OK" button
6. Now image when is added in the editor, double-click the image so the link dialog opens.

Results: Now there are two issues.

1. Link URL text box is empty.
2. If I try to enter some URL and press "OK", JS error is thrown:

Message: SCRIPT5007: Unable to get value of the property 'collapsed': object is null or undefined
Line: 1208 URI: /ckeditor4/plugins/link/dialogs/link.js

Problem can be reproduced in IE8 only in inline mode only from CKEditor 4.0 beta

[Jakub Ś]

Simple workaround is using right-click instead of double-click. If user selects appropriate option from CKE context menu then everything works as expected.