Footnotes on chapter labels

[davidg-sil]

\c 1 \f + \ft Some note\f* Works fine, as does the variant where there's a book-wide chapter label (\cl)

In the following case, however, the note text is preserved but the note caller does not appear:

\c 1  \f + \ft Some note\f*
\cl  The first chapter

Note that \c 1\f ... is not acceptable (and crashes), as the code needs the space after the chapter number to know where the number ends.

[davidg-sil]

The above USFM now produces a caller at the end of the \cl text. Things to note are:

1. It'd be much better to put the footnote somewhere in the \cl line, what we have now is a workaround for substandard USFM.
2. The caller is created when the when the footnote is read assuming that it will be between a drop-cap chapter number and normal text. It is thus sized and positioned to be appropriate for beside normal text. By the time the \cl is met, that time has passed. Thus the size may appear small and an inappropriate weight beside whatever font \cl uses (see point 1).
3. On the assumption that the \cl text is larger than normal text, the marker is raised a bit higher than it would be in normal text, but it will probably not be at the exact height that a footnote on a \cl line would be (see point 1).

[mhosken]

Please note that you can't have a footnote preceding \cp or \ca. The footnote has to follow these.