Fix bug with ignored page_length on first load
Fix bug with ignored page_length on first load

There was no query_config yet, so defaulting to the global options
instead of the new DatatableOptions config was the wrong plan.

jangeador/django-datatable-view,pivotal-energy-solutions/django-datatable-view,greenbender/django-datatable-view,annaproch/django-datatable-view,doganmeh/django-datatable-view,greenbender/django-datatable-view,doganmeh/django-datatable-view,doganmeh/django-datatable-view,annaproch/django-datatable-view,addgene/django-datatable-view,pivotal-energy-solutions/django-datatable-view,jangeador/django-datatable-view,pivotal-energy-solutions/django-datatable-view,annaproch/django-datatable-view,addgene/django-datatable-view,jangeador/django-datatable-view,greenbender/django-datatable-view,addgene/django-datatable-view