I was not trying to drag, but I was trying to select all, which does not work, or is very hard with many messages.
Again, this is going to be very confusing for the end user. I cannot think of another client that acts like this. There should be a way to Select All, and click and drag (or even select all and move/copy). This is behavior that users know, and if they try it, and it does not act as expected, it will create much confusion.
I can live with the move messages for now.
But, there is another issue, which was making this hard to test, not sure if we can address this here, or let me know if I should begin another thread;
If I move any messages with the Move/Copy (filtered or just by selecting), they are now moved to the other folder, if I then go to the other folder, I cannot move them back, or to another folder with the Move/Copy command. It is like WebTop does not know yet that they have moved. And if the moved messages are unread, the new folder does not show the unread messages (although this feature does not seem to work consistently either, sometimes the unread messages show in a folder, sometimes they do not).
I can click and drag them to another folder, but I cannot use the Move/Copy command for moving any messages until I do a browser refresh and reload WebTop.