Minor fix
Minor fix

Caused Xhr.isSupported to be false

cuchac/django-filebrowser,tomassommar/django-filebrowser,JoeGermuska/django-filebrowser,djkartsa/django-filebrowser-no-grappelli,UGentPortaal/django-filebrowser-no-grappelli-django14,brightinteractive/django-filebrowser-no-grappelli,cuchac/django-filebrowser,tomassommar/django-filebrowser,nemesisdesign/django-filebrowser,VishvajitP/django-filebrowser,cuchac/django-filebrowser,adamrt/django-filebrowser,deschler/django-filebrowser,SebasSBM/django-filebrowser,dongguangming/django-filebrowser,michalwerner/django-filebrowser,VishvajitP/django-filebrowser,llann/django-filebrowser,michalwerner/django-filebrowser,ricktaylord/django-filebrowser,tomassommar/django-filebrowser,dongguangming/django-filebrowser,michalwerner/django-filebrowser,brightinteractive/django-filebrowser-no-grappelli,SebasSBM/django-filebrowser,llann/django-filebrowser,JoeGermuska/django-filebrowser,VishvajitP/django-filebrowser,kcsry/django-filebrowser-no-grappelli,dongguangming/django-filebrowser,brightinteractive/django-filebrowser-no-grappelli,haight6716/filebrowser,haight6716/filebrowser,ricktaylord/django-filebrowser,UGentPortaal/django-filebrowser-no-grappelli-django14,SebasSBM/django-filebrowser,michalwerner/django-filebrowser-tinymce4,nemesisdesign/django-filebrowser,kcsry/django-filebrowser-no-grappelli,adamrt/django-filebrowser,adamrt/django-filebrowser,kcsry/django-filebrowser-no-grappelli,michalwerner/django-filebrowser-tinymce4,deschler/django-filebrowser,nemesisdesign/django-filebrowser,michalwerner/django-filebrowser-tinymce4,JoeGermuska/django-filebrowser,djkartsa/django-filebrowser-no-grappelli,llann/django-filebrowser,djkartsa/django-filebrowser-no-grappelli,UGentPortaal/django-filebrowser-no-grappelli-django14,ricktaylord/django-filebrowser