XF 2.2 Thread Editor disappeared?? (after I deleted unused widget)

[rc211e]

While tracking a user problem I noticed an old redundant HTML widget was appearing above the Thread Editor so in my innocence I deleted the widget but it aso took out the editor so now when I click "Recover draft" , "Post thread" or "More options..."
I get this


instead of this


Any ideas on what has happened and how I fix it?

 

[rc211e]

Sorted!
The post thread template must have become corrupted. We reverted to default and the issue resolved.