Drag and Drop Data Object into Empty Folder Raises Exception

[cancan101]

If you drag and drop a Data Object (using tree view) into an empty folder:

Uncaught TypeError: Cannot read properties of undefined (reading 'canSortManually')
    at klass.onTreeNodeBeforeMove

from:

         // dropping objects not allowed if the tree/folder is paginated and sort by index (manual indexes) is enabled
         if(((!newParent.pagingData.canSortManually) || (newParent.childNodes.length > pimcore.settings['object_tree_paging_limit'])) && (newParent.data.sortBy == "index")){
             pimcore.helpers.showNotification(t("error"), t("element_cannot_be_moved_because_target_is_paginated"), "error");
             return false;
         }

[fashxp]

already fixed with #723

[lorextera]

I think something still broken even in the new code, because "newParent.pagingData" is undefined for the empty folder.