I added the burger icon to Gpg4win-master.
So remaining here is to remove the right-click actions when a certification is selected.

A better solution might be to use categories to have that element "this message will be signed / this message will be encrypted" above the edit window. But what I find more important and so much more a high priority is that in cases we have a failure saving the draft info flags an error message should come up. This happened for a customer and in the logs I could see that MAPI returned an error. the button was not toggled in this case but the mail also was not marked for encryption. T7144 is the task for that so I'd suggest to start with that one.

In gpgoladdin:

Changing the icon is unusual and does not match a native look and feel in Outlook where toggle icons are there for a reason, to be toggled or not. This is also the way how Outlooks native encrypt & sign works and Microsoft will probably have thought about this a bit.

Ah, that was what daniel and me actually talked about. So I was a bit dissapointed when I only found the documentation. :)

noticed testing T7128: The Token is very long. Is the serial number not unique? That one is much shorter and therefore better to handle visually

tested with Version 3.2.2.2405000+git~ (Gpg4win-4.3.2-beta41)