Fix/23298/trunk/save confirmation anonymous (#1720)

* 0023298: Making entries "with confirmation" doesn’t work in Public Area (by Anonymous)

* 0023298: Making entries "with confirmation" doesn’t work in Public Area (by Anonymous) (2)

* 0023298: Making entries "with confirmation" doesn’t work in Public Area (by Anonymous) (3)

* save tmp files with session_id() instead of user_id

* fix for keeping file upload

* several code style mismatches