right-to-left support?

should be start and handled via memento to not block kmail. but this is another issue.

why resort the Index?

Because the emails sent by the WKD server are actually multipart/mixed emails with special parts - we inspect those parts in this plugin and if one of the parts contains application/vnd.gnupg.keys we handle the entire email specially in this plugin and otherwise we pass them back to the regular multipart/mixed handler.

possible, but this was broken before already then, the output wasn't changed by this patch

very valid concern, but also not introduced by this patch

because we have a processing plugin for all three, but only a renderer for the first two

i don't get this. can you point me to the part where I see that?

I understand why all three are in that list.

i know, but still it needs to be fixed :)

i know, but still it needs to be fixed :)

sure, but let's address this separately then, not as part of an unrelated patch

dito

that's in the json file, the renderer section only has two entries, so those need to be on 0 and 1 in this enum