[BUGFIX] Captcha must not to be solved correctly on localized pages

related: 53626
[BUGFIX] addFieldOptions fails in IRRE if set in page properties

related: #57080
[BUGFIX] sorting / ordering gets wrong in multilanguage form

related: #41755
manual update
New Version 2.0.18
Merge branch '2.0develop' into 2.0master