Merged V3.2 to HEAD

17075: Merged DEV-TEMPORARY to V3.2
      16768: ETHREEOH-2359: System Error message appears while clicking "View Completed Task" icon for the task, if the user, whom the Adhoc task was assigned to, has been deleted
      16792: *RECORD ONLY* ETHREEOH-1429: Unfriendly error occurs when two content managers create identical content items in appropriate user sandboxes
   17078: Merged DEV-TEMPORARY to V3.2
      16962: ETHREEOH-1289: It is possible to add one Web Form to Web Project twice and more times
   17080: Merged DEV-TEMPORARY to V3.2
      16960: ETHREEOH-1894: Unfriendly notifications appear when trying to edit unlocked content

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@17081 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/web/bean/coci/EditOnlineDialog.java

@@ -192,9 +192,7 @@ public class EditOnlineDialog extends CCCheckoutFileDialog
          catch (Throwable err)
          {
             try { if (tx != null) {tx.rollback();} } catch (Exception tex) {}
-            
-            Utils.addErrorMessage(Application.getMessage(FacesContext.getCurrentInstance(), 
-                     MSG_ERROR_CHECKOUT) + err.getMessage(), err);
+            property.setDocument(null);
          }
       }
    }