[Evolution] Dialog Box "Turning HTML mode off will cause the text to lose all formatting"

[Matthias Huck <matthias huck gmx de>]

Hi, 

I'm using plain text as my default editing mode in the mail composer in
Evolution 3.16.5 on OpenSuse Leap 42.1. Every time I reply to an HTML
formatted message, it displays a dialog box: "Turning HTML mode off
will cause the text to lose all formatting. Do you want to continue?"
with two buttons "Don't lose formatting" and "Lose formatting". 

Is there any way to permanently deactivate this dialog box? (Other than
formatting my mail in HTML.) I'm generally okay with losing the
formatting of the quoted part, and getting to see this question all the
time is becoming somewhat annoying after a couple of days. I think it
just disrupts my workflow, and if it can be deactivated in my version
of Evolution, I'd be glad to do that instantly.

Thanks a lot for your help.

Kind regards,

Matthias.