Several fixes for Custom Theme tool in new UI
Documenting the new UI with a FreeNAS System updated to FreeNAS-11.2-MASTER-201807230852:
Found an option while creating a new theme that doesn't have an accurate name: Choose Logo Type
This option is supposed to be set/unset to indicate if the theme is "dark" or not.
Damian asked me to open this ticket as a reminder to update the name for this option.