Fixes for AR-1940. Extension was being lost and defaulting back to ".doc" which meant webdav links were being built incorrectly for Excel and PowerPoint.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@7722 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/web/scripts/office/office_addin.js

@@ -7,6 +7,8 @@ var OfficeAddin =
    STATUS_FADE: 10000,
    LIST_DEF_HEIGHT: 204,
    
+   defaultQuery: "",
+   
    init: function()
    {
       window.queryObject = OfficeAddin.toQueryObject(document.location.search);