Problem with deleting container of current page

We have a left_menu with many containers. We saw that offering an 
actionMenu for each container is very bad for the performance, as all the 
containers of this sub-pages are read and checked, whether they are locked 
or not. So we decided not to show the actionMenu for each container in 
this list, but only for the ones, which have a linked page. For the direct 
pages the editor has to first access the page and there he will get the 
buttons, where he can update or delete the page and the container, where 
the page is included. 

For the update this is no problem. It is only a problem for the deletion, 
because after confirming the delete-popup, the current page is reloaded in 
the javascript method CloseJahiaWindow. As the page has been deleted this 
leads to an HTML error 404. 

Do you have a suggestion, how we could change this behaviour, so that 
either the parent page is loaded instead, or where we should place the 
delete button, but still having a good performance.

Greetings,
Benjamin Papez