[Victor D]

For 4.2 sort bar is invoked thru dialog.tpl
In our templates we check if there is some specific conditions are met before placing it in dialog title area.
Alternatively you can use custom dialog2.tpl for your own dialogs and remove sort bar from here.
Please note that for dialogs title with sortbar is applied specific CSS class that sets title's width to 50%
Don't forget to customize this class appliance too