History in the fields "to", "subject" and others

It would be convenient if the fields of the address, subject, copy, blind copy were drop-down and you could select the previous values ​​from them. For example, I write letters to different companies with the same text, which is on the clipboard for convenience. But the subject is the same, and the clipboard is already occupied by the text of the letter. It would be very convenient if, by clicking on the “beak” (or whatever it is called) in the “subject” field, you could select one of the 20 (set in the settings) recent topics.