[Users] Attachment file display uses different date format from summaries

[mnieuw at zap.a2000.nl]

System Linux Mint XFCE 19.2, Claws 3.17.8, the system's date format is set to ISO YYYY-MM-DD HH:MM .

Claws Preferences->Display->Summaries->Message list, date format %Y-%m-%d %H:%M (ISO)

When composing a message, and using the "attachment" tab, the date of files shown do not strictly use the format, 
but recent files are shown as "yesterday at 14:05" or "Tuesday" .

I have not found a setting to make it use the same format as the summary display. Is there one or is this a limit/bug in Claws?

Mat Nieuwenhoven