A few days ago ther ewas a great buzz that GMail finally(!) has a “delete button”. I too was among those who missed it from the beginning on, but I got used to select the delete-function from the menu. Still, a button would have been nice. OK, now there is one – but, wait a minute – I’m in Germany. NO Delete button to be found!
The solution is as simple as it is annoying! Just switch the language of the user interface to English (US) and you get the delete-Button. Switch it back to German (or other languages) and its gone.
Either they are still too US-centric or their QA-department did not pay attention.