Kill the layout manager

Supersedes #6257

This PR "fixes" the pager by removing the layout manager.  It is a much smaller PR than #6257.
Something like that seem to do the trick.
```
 this.pager_element.resizable({handles: 'n', resize: function( event, ui ) {
            $('.end_space').css('height',Math.max(200,ui.size.height)+'px')
        }
```