fix 3.5.2 post data error
fix 3.5.2 post data error

bnzk/djangocms-misc,bnzk/djangocms-misc,benzkji/djangocms-misc,bnzk/djangocms-misc,bnzk/djangocms-misc,benzkji/djangocms-misc,benzkji/djangocms-misc,benzkji/djangocms-misc