Column resizing.
 

Double clicking on the resize line should expand the column to the left of the line to fit the longest entry in said column. (Think: Windows Explorer)

I understand why you might have put a maximum column size limit for resizing in the transfer tab, as some columns will never have information in them wider than a certain size, but the implementation seems rather poor to me. The column width limit should not be narrower than the text in the column title plus the arrow for sorting.

Currently I cannot resize the speed column ot the right more than enough to see "Avg. s..." and resizing a column to the left won't work until it has reached the maximum width of the column to the left. (easy to see by switching to fullscreen mode then resizing the speed column left) If I reach the maximum column size limit it should drag that column and start resizing the next one over instead of just stopping. At the very lest the way the program deals with resizing to the right should be the same as it deals with resizing to the left.