Usermin Read mail summary screen is too crowd

Hi all,

I’m fresh in virtualmin and anybody can help me to tune it about the read mail summary screen that shows on attached picture, that all the fields (from, data, size & subject) are compressed together. I think it caused by the subject line is too long. Can I fix all field length? If the field length is exceed the pre-defined long, it will be truncated. Is it build-in such function already?