Changes with Aloha.Editor 0.24.8

Bugfix RT56973

blocks: The dragging and dropping of Aloha Blocks has been fixed to no longer use jQueryUi‘s sortable(). Aloha Editor‘s own functionality is to be used instead. This allows implementers to use sortable() to enable drag and drop for blocks which are inside of blocks that have been made draggable by Aloha Editor.