Fixes #7864. 'required'-FE Elements, deactivated via...

Fixes #7864. 'required'-FE Elements, deactivated via formModeGlobal=requiredOff, now gets class 'required-field'. The final 'required' mode is still temporarily disabled.
1 job for F7864requiredOffSetClassRequired in 2 minutes and 19 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed snapshot #1720

00:02:19