studio: display optionally title on split slide

[peterpeterparker]

Description

currently in the editor ("studio"), the template "split" is used without any title (two columns without title). as the slide offers the ability to display a title too, should we add this option to the editor too?

Question

in terms of UX what's better, should we add an option the user could trigger in order to display or not the "title" or more easily, should we display two different templates in the list of slide (in the popover where user select which a template to be added to the presentation)?

I tend to rather like this second option but open to suggestion.