Hi,

This patch adds from-logo support to ox-koma-letter.el.

Tested it manually with Elisp and also in buffer properties. There are
four combinations (both in properties, both in Elisp, and then the two
permutations).

It was a copy-and-paste job so I marked it as a tinychange even though
it was more than 15 lines.

Ran the system tests and they pass.

Sincerely,

Grant Rettke