New:Add support for PNG avatars (#10501)Add setting to display ISO date and time in message list (#10566)Used fixed-width font for composing when user chooses fixed-width for viewing (#907)Changed:Attachment summary moved from message bottom to header for visibility (#10530, #10576)Fixed:EHLO parsing exception appeared in logcat when sending email (#9059)"Delete (from notification)" setting did not retain state (#10494)Find folder search hint text was cut off on smaller screens (#10272)User was not notified if they were offline when sending message (#10134)Warned "Sent folder not found" when uploading sent messages was disabled (#10420)Loading bar appeared detached from header, leaving visible gap (#10488)CC/BCC fields were not expanded by default for Reply All (#10440)