document.open, file.place and document.pdfInfo read cropTo (and its
older name crop), password, colorMode and textAs as strings and used
the default when a value was not a string, so "textAs": true or
"colorMode": 5 opened the file with the defaults. They now return an
error naming the param, and nothing opens or is placed. A wrong crop is
refused even when cropTo is given. document.pdfInfo also rejects a
thumbnailSize that is not a number, with or without a thumbnail.
Leaving a param out or giving null keeps its default, and an empty
password still means no password.