update MainWindowController to allow to specify controller for CustomExecutableStep

3 jobs for 362-issue in 16 minutes and 1 second (queued for 3 seconds)
Status Name Job ID Coverage
  Prepare
passed build-docker #210342
generic_privileged

00:13:49

 
  Build
passed build-ubuntu #210343

00:02:12

passed build-windows #210344

00:01:16