Bug 5175: Add missing Subtitle to 2 styles

- Sunday Morning:
    Supplement Page::print to add call to print_global_subtitle().
    Supplement propgroups and CSS to display and customize Title
    and Subtitle.
- Transmogrified:
    Supplement Page::print to add call to print_global_subtitle().
    Supplement propgroups and CSS to display and customize Title
    and Subtitle.
Merge pull request #39 from meludame/bug5175/AddMissingSubtitles

Bug 5175: Add missing Subtitle to 2 styles