Readd the "return to folder" button
In the old basic mail a week ago, when you clicked on an email, there would be a button in the top left that said "Return to <FOLDER>" with whatever folder you had been in. Clicking that would take you back to viewing the folder in the state it had been when you left, including if any emails were checked off or not.
Now, that button is missing. So there's no easy way to get back to viewing what you were looking at before you clicked an email.
Please restore the "Return to <FOLDER>" button.

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Allen Davis commented
Please reinstate the feature where, when viewing an email and deleting it, the next email shows up instead of returning to the full list.
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Mo Money commented
this used to be an option why would you take it away?