Please bring back the trashcans (delete) back into a solid red X! It was so much easier to discern.
In the 'Deleted' folder, turn one of the trashcan back to a solid red 'X'.
I just use the Delete key.
And please bring back the trascan icon into the mails itself, when hovering over a mail. same applies to the category icon, where it had been possible to simply click on a IMPORTANT icon directly.