Add option to export PDF on type only when document has a title

[hffeka]

Motivation

Currently, I can only use onType in my workflow using Zathura for previewing. But whenever I create and edit modules / templates, I have to delete a bunch of unnecessary PDFs.

The onDocumentHasTitle option could solve this, if you could choose to pair it with either onSave or onType.

Description

Many possibilities for implementation. I guess the most simple one would be to add one additional option that would combine onDocumentHasTitle and onType.