XWIKI-10283: Adding content (images, links, table, macros) is not working anymore in WYSIWYG on IE10
XWIKI-10282: The content from a document is not visible when editing in WYSIWYG on IE10
* Fix IE10 permutation after upgrading to GWT 2.6

(cherry picked from commit 7233c1b6ce7d236bfc1ce568180c1f0d4524b0a9)