Align theme defaults to Skip Lines / Indent for webbooks, PDF and EPUB

[MichSpieler]

Feature Description

As an author, I am expecting the default theme setting for Skip Lines / Indent to be the same for all versions of the book (webbook, PDF and EPUB). Currently, the default for the webbook is Skip Lines, but for the PDF and for the EPUB exports it is Indent.

Feature Use Case

The network manager making this request did not give a reason other than consistency.

Other Notes

The reason for the setting (indent defaults for PDFs) seems to be connected to accessibility and that indents are deemed more accessible in print documents.
Link to ticket (for Support staff only)