Ongoing (slow) operation is not clearly communicated
I'm using Evolution as a backup client, while my usual clients are Geary or Gmail. This is to say that I don't have any confidence with Evolution. I'm writing to point out what may be a UI issue. When I select many conversations and archive them, it takes a lot of time. It takes a lot of time even if I move them to another folder. I have no clear visual indication that there's an ongoing operation. Now I know there's the status bar at the bottom with the GNOME logo "spinning" and the message "Moving messages". But at the beginning it was not clear. After a while the selected messages get a strikethrough, which I think it's a way to say "The messages are about to be moved".
Maybe the real problem is that it's damn slow, it takes 5 minutes to move 22-thousand messages.