Handling comments on online forum posts

[viccie30]

Biblatex-apa correctly handles a coment on an online periodical article or post, like example 10.1:18 in the Publication Manual or the newspaper comment example on the APA website. This also neatly covers the blog comment example on the website.
However, the website also specifies a forum comment example that has the title of the related work in italics instead of quoted. This (sort of) example is not mentioned in the Publication Manual and biblatex-apa currently hardcodes quoting the title of the referenced work in the related:commenton bibmacro at

biblatex-apa/tex/latex/biblatex-apa/bbx/apa.bbx

Lines 1315 to 1317 in cd2a723

	\newbibmacro*{related:commenton}[1]{%
	\entrydata*{#1}{%
	\printtext{\mkbibquote{\printfield[apacase]{title}}}}}

.
I guess the formatting needs to change based on the formatting of the title of the referenced entry to match the forum comment example.

[viccie30]

For now I've added this to my biblatex.cfg, using the citetitle format from aba.cbx:

\renewbibmacro*{related:commenton}[1]{%
  \entrydata*{#1}{%
    \printtext[citetitle]{\printfield[apacase]{title}}}}

It seems that the citetitle format uses the same general rule that APA uses to determine quoting or italicizing titles: standalone works get italics, works that are parts of a larger work get quotes.
citetitle also has rules for different kinds of legal references, but those are messed up in APA anyways, so I can't imagine this would make comments on legal documents any more valid or invalid.