Delphi IDE Explorer is broken in Delphi 10.3 Rio

[dummzeuch 1517]

I just found out what is wrong with my Delphi IDE Explorer in Delphi 10.3 Rio. The symptom is that the Follow Focus option and the Select Active button no longer work in some forms, in particular in the options dialog (Tools -> Options / Run -> Parameters / Project -> Options). The reason is that this dialog now uses the Screen.OnActiveControlChange event itself ...

https://blog.dummzeuch.de/2018/12/09/delphi-ide-explorer-is-broken-in-delphi-10-3-rio/