Do not copy override_url when creating subpages
Do not copy override_url when creating subpages

Thanks to bartTC for the suggestion.

hgrimelid/feincms,michaelkuty/feincms,nickburlett/feincms,joshuajonah/feincms,hgrimelid/feincms,matthiask/feincms2-content,feincms/feincms,joshuajonah/feincms,joshuajonah/feincms,michaelkuty/feincms,nickburlett/feincms,pjdelport/feincms,mjl/feincms,hgrimelid/feincms,mjl/feincms,feincms/feincms,pjdelport/feincms,matthiask/django-content-editor,nickburlett/feincms,joshuajonah/feincms,michaelkuty/feincms,mjl/feincms,nickburlett/feincms,matthiask/feincms2-content,matthiask/django-content-editor,pjdelport/feincms,michaelkuty/feincms,feincms/feincms,matthiask/django-content-editor,matthiask/django-content-editor,matthiask/feincms2-content